Which of the statements describing the gaseous exchange system of the common green grasshopper is/are correct? AS Cells, Exchange and Transport Question Paper Cells, Exchange and Transport Mark Scheme. More detail than can be seen with the naked eye, use of stains. Exchange Across Cell Membranes AS Biology Answers AQA OCR Edexcel Author: Maths Made Easy Subject: A Level Biology Keywords: biology, questions, worksheets, revision, aqa, edexcel, ocr, a level, Cell membranes, Created Date: 9/28/2017 11:38:33 AM Some questions might require synoptic thinking, using knowledge and ideas from various topics across the full A Level content. If the oxygen concentration is lower than this trout numbers decline. Please consider whitelisting us on your ad blocker, or making a donation. A l a r y n x �! Diffusion doesn't have a fast enough rate. The syllabus includes the main theoretical concepts which are fundamental to the subject, a section on some current applications of biology, and a strong emphasis on advanced practical skills. Level. Designed for the CIE A Level Biology (9700) syllabus, for examinations from 2022 Model answers made by experienced teachers Specimen Papers < > 2017. PDF 2MB; Biology mathematical skills handbook This mathematical skills handbook is designed to accompany the OCR AS and A Level specifications in Biology A and Biology B (Advancing Biology) for teaching from September 2015. Biology revision resource made by teachers. Sample exam questions - exchange and transport in animals Understanding how to approach exam questions helps to boost exam performance. Module 3: Exchange and Transport. A and As Level Biology 9700 Cambridge International AS and A Level Biology builds on the skills acquired at Cambridge IGCSE (or equivalent) level. Exam questions organised by topic, past papers and mark schemes for the NEW OCR A Level Biology. AS Papers 1 & 2 Why are light microscopes used to look at dissected stuff? 1 Trout are very active and their cells have a high oxygen demand. Ait has goble t c e l l s B i t h a s a c i l i a t e d e p i t h e l i u m C i t h a s s m o o t h m u s c l e D i t h a s r i n g s o f b o n e Y o u r a n s w e r 1 4 W h e n a i r i s b r e a t h e d i n b y m a m m a l s , w h a t i s t h e c o r r e c t o r d e r o f s t r u c t u r e s i t p a s s e s t h r o u g h ? 2 Diffusion of oxygen in water is slower than in air. All questions come from actual A-level biology past papers . Examples of insects with high energy demands, Locusts, grasshoppers, bees, wasps, flies, Alternatives to tracheal system in insects, Mechanical ventilation of tracheal system, collapsible enlarged tracheae that act as air reservoirs. Welcome to the Biology section of CramNow, a collection of hundreds of FREE, self marking, AQA A Level Biology multiple choice questions. This website makes use of cookies. What do the elastin fibres do in the alveoli? AcelluloseBchitinCglycogenDstarchYour answer 18 The common green grasshopper (Omocestus viridulus) is an insect found across the UK. This surface must have: large surface area; thin permeable surface; moist exchange surface; Gas Exchange in Plants. First created in 2000 and updated in 2013, 2015 & 2020 . To make your choice easier, the outline of the material that is covered throughout the A-Level Biology OCR course is provided below: Development of practical skills in Biology; Cells, chemicals for life, transport, and gas exchange (cells and microscopy, water, proteins and enzymes, nucleic acids, the heart, transport systems in mammals and plants, gas exchange in mammals and plants); a) Late prophase . Ato absorb oxygenBto absorb water vapourCto absorb carbon dioxideDto absorb nitrogen Your answer 8 Which one of the following cannot be measured by a spirometer? com. Enzymes. Find A Level Biology past papers, worksheets and revision materials on Maths Made Easy. Available for OCR A and B specifications. Chapter 2 (PDF) Chapter 3 (PDF) Chapter 4 (PDF) Chapter 5 (PDF) Chapter 6 (PDF) Chapter 7 (PDF) Chapter 8 (PDF) Chapter 9 (PDF) Biology A AS/Year 1. p >" �) � إ \� � إ إ � � | � � j� �) ���� ��O)�� ���� � � n� ֻ w� 0 �� �� � �� z� V �� $ j� �� >" j� l \� \� إ \� \� \� \� \� � � У \� \� \� �� \� \� \� \� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� �� \� \� \� \� \� \� \� \� \� � � : Multiple Choice Questions (MCQ) topic quiz Exchange surfaces Instructions and answers for teachers These instructions cover the learner activity section which can be found on HYPERLINK \l "_Enzymes_1_Multiple"page 9. Can you measure residual volume directly? AcelluloseBchitinCglycogenDstarchYour answer 18 The common green grasshopper (Omocestus viridulus) is an insect found across the UK. l a r y n x �! OCR AS and A Level Biology B (Advancing Biology) - H022, H422 (from 2015) qualification information including specification, exam materials, teaching resources, learning resources Courses. How do insects prevent water loss through the spiracles? Ahumidifying the airBwarming the airCreducing surface tensionDpreventing dehydrationYour answer 17 Which polysaccharide is found in the exoskeleton and tracheae walls of most insects? The questions in this quiz cover topics mainly from specification section: Biology A 3.1.1 Exchange surfaces Biology B (Advancing Biology) 2.2.3 Gas exchange in mammals and plants.Multiple Choice Questions (MCQ) topic quiz - answers 1 Which one of the following is not a feature of most efficient gas exchange surfaces? CIE A Level Biology 9700. Water is denser, more viscous and has a lower oxygen content than air, so requires too much energy to be efficiently moved by a 2-way ventilation system. Both include multiple choice, short answer (structured questions, problem solving, calculations, practical) and extended response questions. Ait has goblet cellsBit has a ciliated epitheliumCit has smooth muscleDit has rings of bone Your answer 14 When air is breathed in by mammals, what is the correct order of structures it passes through? Practice exam-style questions including multiple choice, maths, practical and synoptic questions Ocr biology exam style questions PDF 6MB; Graphs, tables and drawings: student checklists When the smooth muscle contracts, the bronchioles constrict. Molecules, Biodiversity, Food and Health Question Paper. Adead spaceBresidual volumeCtidal volumeDvital capacityYour answer 5 During inspiration (inhalation), which of the following is correct? Start Now . A selection of multiple choice and missing word questions about cell membrane structure and the movement of substances across it. Which of the statements describing the gaseous exchange system of the common green grasshopper is/are correct? They need 5-6 mg dm-3 dissolved oxygen for normal activity. What does the thin layer of flattened epithelium do in the bronchioles? Module 3 – Exchange and Transport Revision Notes: Exchange Surfaces; Transport in Animals These have been made according to the specifications (H020, H420, H021, H421) and cover all the relevant topics for examination in May/June. Past Papers. �) �� � 0� L� � � � � � � � $ Ӿ � �� . t r a c h e a �! 1) Multiple Choice Questions [OCR AS P1 18 Q1-20] (44:41) 2) Properties of Water, Surface Area to Volume Ratio & Circulatory Systems [OCR AS P1 18 Q21] (28:50) Author: Created by HenrikHanson. AS. AQA GCE Biology AS Award 1411 Unit 2 Gas exchange Gas Exchange Answers & Markscheme Question 1 Question 2 . b r o n c h u s B l a r y n x �! Alarge surface areaBthin epitheliumCmicrovilliDmaintained concentration gradientYour answer 2 Streptococcus pneumoniae is a spherical-shaped bacterial pathogen that is best known for causing the respiratory illness pneumonia in humans. c) late metaphase . Everything you need to know about Exchange Surfaces for the A Level Biology OCR exam, totally free, with assessment questions, text & videos. b r o n c h u s �! This resource can be used to test and consolidate understanding at the end of a topic or to revisit and refresh knowledge at a later point in the course. A Level Biology: 3 Written papers A Level paper 1 - Biological processes (135 mins) 37% weighting Structured and multiple choice questions Assesses modules 1,2,3 and 5 A Level paper 2 - Biological diversity (135 mins) 37% weighting Structured and multiple choice questions Assesses modules 1,2,4 and 6 A Level paper 1 - Unified Biology (90 mins) References from previous Science tutors may be … Botany MCQ . Exchange Surfaces For exchange to be effective: The surface area of an organism must be large compared with its volume. Why do the tips of adjacent gill filaments overlap? Just as when following the AQA A Level Biology qualification, your A Level students studying OCR Biology A will need to demonstrate to you, their teacher(s), that they are consistently and routinely competent in each of the skills and techniques defined for A Level Biologists. Some questions might require synoptic thinking, using knowledge and ideas from various topics across the full A Level content. b r o n c h u s D p h a r y n x �! Also offering past papers and exam questions by topic for AQA, Edexcel and OCR. If the oxygen concentration is lower than this trout numbers decline. First created in 2000 and updated in 2013, 2015 & 2020 . Free timetable app ← Back to Library. A1, 2 and 3BOnly 1 and 2COnly 2 and 3DOnly 1 Your answer 19 In bony fish, what is the operculum? Mark Scheme. A1, 2 and 3BOnly 1 and 2COnly 2 and 3DOnly 1 Your answer Version 1 PAGE \* MERGEFORMAT 8 � OCR 2017 C D C D B D C C C D A B D C A C B A C B This resource has been produced as part of our free Biology teaching and learning support package. Home; Biology MCQs; Practice Test; Difference Between; Biology Notes; Biology Videos; Contact us ; Multiple Choice Questions on Cell Division - Mitosis 1. Past Papers. Can be opened or closed by sphincters, closed for as long as possible, High carbon dioxide levels, high oxygen demand, Purpose of chitin in the tracheae in insects, Keep them open if bent or pressed, makes up the cuticle. DiaphragmInternal intercostal musclesExternal intercostal musclesAcontractedcontractedrelaxedBcontractedrelaxedcontractedCrelaxedcontractedrelaxedDrelaxedrelaxedcontracted Your answer 6 During expiration (exhalation), which of the following is true about the thorax? Single-celled Organisms. Where can you find the internal and external intercostal muscles? Which of the statements would account for the high concentration of oxygen required? OCR A Level Biology- Exchange Surfaces. Performing well with your OCR A-level biology is getting your planning and support right. Biological Membranes A Biology Questions AQA OCR Edexcel Author: Maths Made Easy Subject: A Level Biology Keywords: A LEVEL, Biology, science, revision materials, aqa, new specification, ocr Created Date: 9/28/2017 9:04:48 AM FREE videos to help you learn content and revise. Unit of work, including PowerPoint lesson plans and student notes to print, as well as exam questions and mark schemes for some lessons. Why does diffusion not work in multicellular organisms? 3 Tracheoles have a large surface area for efficient gaseous exchange. Thank you. Biology A Level Revision Quiz. Created: Mar 26, 2016 | Updated: Feb 22, 2018. This is because single-celled creatures have a very high surface-area-to-volume ratio, so have lots of available surface to exchange substances. 2 Water loss can be controlled by the opening and closing of spiracles. PLAY. Tracheal fluid in the tracheoles limits diffusion of oxygen into cells, lactic acid build up will cause water to leave the tracheoles by osmosis, oxygen can then diffuse into surrounding cells, To limit the penetration of air for diffusion. This changes the amount of air reaching the lungs. A-Level Biology Question and Answers 2020/2021 All copyright and publishing rights are owned by S-cool. Biology Revision - PMT - physicsandmathstutor Ocr a level biology exam questions by topic. ���� gd�;~ gd/{� gd�� gd�T� �� gdDi_ gd�� gd�� $$��� @&. Multi-celled creatures on the other hand tend to have a low surface-area-to-volume ratio, meaning their outer surfaces cannot exchange substances fast enough for all their cells. Guard cells enclose stomata and swell to reduce … 3 Blood and water flow in opposite directions across the gills ensuring optimum levels of gaseous exchange. Sum of the vital capacity and residual volume, How expiratory reserve volume is represented on a spirometer graph, Line between troughs of tidal volume and start of the residual volume, How inspiratory reserve volume is represented on a spirometer graph, Line between peak of tidal volume and top of total lung capacity, How inspiratory capacity is represented on a spirometer graph, Line between trough of tidal volume and top of total lung capacity, How vital capacity is represented on a spirometer graph, Line between top of residual volume and top of total lung capacity, How residual volume is represented on a spirometer graph, Line beneath the lowest trough of tidal volume, Total volume of air inhaled in one minute, Ventilation rate = Tidal volume x Breathing rate, Relationship between tidal volume, breathing rate and oxygen uptake, As oxygen demand increases, tidal volume increases, breathing rate increases, oxygen uptake increases. � � � � W z � � � � � � � � � � � � � � � � � � � � � � � � gd�=Y gd/]4 -D M� Notes for the OCR A Level Biology module: Module 3: Exchange and Transport. What controls the extent of gas exchange in insects? If it was in quiz format and only had 12 multiple choice questions. Studies have shown that using multiple choice questions and retrieval practice can improve your grades. Where does air enter the system in insects? This Lesson Element supports OCR AS and A Level Biology A (H020, H420) and Biology B (Advancing Biology) (H022, H422). Subscribe . AcartilageBsmooth muscleCciliaDmicrovilliYour answer 11 Which one of the following has the highest concentration of oxygen? Theory questions. When distributing the activity section to the learners either as a printed copy or as a Word file you will need to remove the teacher instructions section. Avital capacityBbreathing rateCresidual volumeDtidal volume Your answer 9 The air in the trachea, bronchi and bronchioles is termed the �dead space�. Past papers, summary notes, factsheets and past exam questions by topic for AQA, CIE, Edexcel, OCR and WJEC Biology AS and A-Levels Ocr a level biology exam questions by topic Aatmospheric airBalveolar airCair in the dead spaceDexhaled airYour answer 12 When oxygen diffuses from the alveolus into the plasma, how many cell layers does it cross? The sites linked to here are not maintained by me, although I have checked them for … t r a c h e a Y o u r a n s w e r 1 5 W h i c h o n e o f t h e f o l l o w i n g d o e s n o t c o n t a i n c a r t i l a g e ? This Lesson Element is a teaching and learning resource containing 20 multiple choice questions (MCQs) on the theme of exchange surfaces. t r a c h e a C p h a r y n x �! .) A level year two interactive quizzes Section 5 Energy transfers. d) early metaphase. AS Papers 1 & 2 So if you’re revising Current and Voltage for AQA A-Level Physics, you can find all of the Current and Voltage questions that have been ever asked by AQA in one single document - useful, no? Level. Increase the amount of air moved through the gas exchange system, inflated and deflated by ventilating movements of the thorax and abdomen, Explanation for why fish have the gas exchange system that they have, Too much energy to move dense water in and out of lung like respiratory organs, Large surface area, good blood supply, thin layers, tips of adjacent gill filaments overlap, water moving over the gills and the blood in the gill filaments flow in different directions, Efferent blood vessel, afferent blood vessel, gill lamellae, gill filaments, Role of the efferent blood vessel in fish, To carry the blood leaving the gills in the opposite direction to the incoming water to maintain a steep concentration gradient, Role of the afferent blood vessel in fish, Flow of water to keep them apart to expose the large surface area needed for gaseous exchange, Continuous movement of water to ventilate the gills, Mouth opens, floor of buccal cavity lowers, volume of the buccal cavity increases, pressure in buccal cavity drops, water moves into the buccal cavity, opercular valve shuts, opercular cavity expands, pressure in opercular cavity drops, floor of the buccal cavity moves up, pressure increases, water moves from buccal cavity over the gills, mouth closes, operculum closes, sides of the opercular cavity move inwards, pressure in the opercular cavity increases, water moved over the gills and out of the operculum, floor of buccal cavity moves up, water flowed out of the gills. Get revising Biology today - A-level, A2 and AS Biology revision section. b r o n c h u s �! OCR A-Level Biology A (H420 & H020) and Biology B Advancing Biology (H422 & H020) past (exam papers and marking schemes, the past papers are free to … AQA GCE Biology AS Award 1411 Unit 2 Gas exchange … The syllabus includes the main theoretical concepts which are fundamental to the subject, a section on some current applications of biology, and a strong emphasis on advanced practical skills. 3 Tracheoles have a large surface area for efficient gaseous exchange. OCR A Level Biology past paper exam questions organised by topic with model answers. b r o n c h u s D p h a r y n x �! Can You Get Through This A-Level Biology Quiz? Resources for Applied Ecology, Core Principles/Foundation, Energy, Control and Continuity, Genes and Genetic Engineering, Microbes and Disease, Physiology and Transport, Reproduction and Population. b r o n c h u s �! � Q >" \� � (� | \� \� � .) The biology questions are organised inline with the AQA A Level Biology Specification, the Chemistry questions use OCR and the Physics questions use Edexcel. A1B2C3D4 Your answer 13 Which one of the following is not true of the trachea? Cambridge International AS and A Level Biology builds on the skills acquired at Cambridge IGCSE (or equivalent) level. Why can't fish breathe in and out via ventilation? When the email template pops up please add additional comments if you wish and then just click �Send�. These instructions cover the learner activity section which can be found on page 11. h�2� 0J �j hP3$ h�2� Uh�2� j hP3$ hj UhP3$ hb=� hP3$ hf� hf� h�� 'h/]4 h/]4 5�B*CJ( PJ \�aJ ph�/5 !h�=Y 5�B*CJ( PJ \�aJ ph�/5 h�� h�� h�) hk� h�� h�j ! Each episode is an in-depth guide to answering the exam paper by a full time current teacher with 23 years of A level Biology experience. The questions are written so that the incorrect answers are plausible distractors based on common errors or misconceptions. Alarge surface areaBthin epitheliumCmicrovilliDmaintained concentration gradientYour answer 2 Streptococcus pneumoniae is a spherical-shaped bacterial pathogen that is best known for causing the respiratory illness pneumonia in humans. By clicking on HYPERLINK "mailto:resources.feedback@ocr.org.uk?subject=I%20liked%20the%20Biology%20A%20and%20Biology%20B%20Exchange%20Surfaces%20mulitple%20choice%20quiz" �Like� or HYPERLINK "mailto:resources.feedback@ocr.org.uk?subject=I%20disliked%20the%20Biology%20A%20and%20Biology%20B%20Exchange%20Surfaces%20mulitple%20choice%20quiz"�Dislike� you can help us to ensure that our resources work for you. AThe pressure decreases causing the volume to increase.BThe pressure decreases causing the volume to decrease.CThe pressure increases causing the volume to increase.DThe pressure increases causing the volume to decrease.Your answer 7 A spirometer can be used to help diagnose a lung condition, such as asthma. You're blocking ads :(Revisely is 100% funded by ads. They need 5-6 mg dm-3 dissolved oxygen for normal activity. A-Level Biology Question and Answers 2020/2021 All copyright and publishing rights are owned by S-cool. How does air get into the places it needs to in an insect? Zoology MCQ . Molecules, Biodiversity, Food and Health Mark Scheme A Level Communication, Homeostasis and Energy Question Paper. 9700 CIE AS Level Biology Multiple Choice Exam Questions ... For Students studying CIE AS Level Biology 9700. NEW OCR A Level Biology - Exchange Surfaces & Breathing. t r a c h e a C p h a r y n x �! Since gas exchange occurs by diffusion alone, single-celled organisms such as bacteria do not need any specialised structures to achieve it for them. Thanks for looking Please remember to leave feedback, for updates and promotions you can also follow me here OCR AS and A Level Biology B (Advancing Biology) - H022, H422 (from 2015) qualification information including specification, exam materials, teaching resources, learning resources The biology questions are organised inline with the AQA A Level Biology Specification, the Chemistry questions use OCR and the Physics questions use Edexcel. Just as when following the AQA A Level Biology qualification, your A Level students studying OCR Biology A will need to demonstrate to you, their teacher(s), that they are consistently and routinely competent in each of the skills and techniques defined for A Level Biologists. 1) Multiple Choice Questions [OCR AS P1 18 Q1-20] (44:41) 2) Properties of Water, Surface Area to Volume Ratio & Circulatory Systems [OCR AS P1 18 Q21] (28:50) The volume of dead space in an individual can be estimated using the formula: dead space (cm3) = mass of subject (kg) / 0.45 If 1 stone (st) is equal to 6.350 kg, calculate (to two significant figures) the dead space for a woman of 8.0 st. A50 cm3B14 cm3C110 cm3D1.8 cm3 Your answer 10 Which one of the following is not found in the wall of a bronchus? Created: Mar 26, 2016 | Updated: Feb 22, 2018. Gas Exchange takes place at a respiratory surface. Although they are organised following the AQA A Level Biology Specification, there will obviously be a lot of overlap in content with the other exam boards such as OCR. What does the ciliated epithelium do in the trachea? High surface area to volume ratio, low metabolic activity, rate of diffusion is enough. OCR (A) A-Level Biology Revision For each of the papers below, there are revision notes, summary sheets, questions from past exam papers separated by topic and other worksheets. When it relaxes, the bronchioles dilate. Which of the statements would account for the high concentration of oxygen required? Each quiz consists of 12 questions and you have ten minutes to complete the quiz. Past papers, exam questions by topic, revision notes, worksheets and solution banks. A a l v e o l u s B b r o n c h i oleCbronchusDtracheaYour answer 16 How does surfactant prevent the alveoli from collapsing? Learn vocabulary, terms, and more with flashcards, games, and other study tools. A-level OCR biology past papers. This resource is a set of multiple choice questions to help students revise A Level Biology questions on gas exchange surfaces. My students like to revise a topic then practice any... A Level Biology Revision | AQA, OCR & Edexcel. To contain lubricating fluid to allow membranes to slide over each other as you breathe, Diaphragm contracts so it flattens and lowers, external intercostal muscles contract, ribs moved up and out, volume of thorax increases, pressure in thorax reduced so it is lower than air pressure, air drawn through the gaseous exchange system to equalise the pressure gradient, Diaphragm relaxes and moves up, external intercostal muscles relax, ribs move down and inwards under gravity, elastic fibres in the alveoli return to normal length, volume of thorax decreases, pressure inside thorax greater than air pressure, air moves out of lungs to even out pressure gradient, Internal intercostal muscles contract, ribs pulled down hard and fast, abdominal muscles contract, diaphragm forced up, increased pressure in lungs, House dust mites, cigarette smoke, pollen, stress, Cells lining the bronchioles release histamines, epithelial cells become inflamed and swollen, histamines stimulate goblet cells, more mucus, smooth muscle in bronchiole walls contract, airways narrow and fill with mucus, Attach to active sites on the surface membrane of the smooth muscle in the bronchioles, relax and dilate the airways, Reduce the sensitivity of the lining of the airways, Peak flow meter, vitalographs, spirometer, Device that measures the rate at which air is expelled from the lungs, Patient breathes out as quickly as possible, instrument produces a graph of the air breathed out, Tidal volume, vital capacity, inspiratory reserve volume, expiratory reserve volume, residual volume, total lung capacity, Volume of air that moves in and out of the lungs with a resting breath, Volume of air that can be breathed in when the strongest possible exhalation is followed by the deepest possible intake of breath, Maximum volume of air you can breathe in over and above a normal inhalation, Extra amount of air you can force out of your lungs over and above the normal tidal volume of air that you breath out, Volume of air left in your lungs after exhaling as hard as possible. If an individual Streptococcus pneumoniae has a diameter of 1 �m, what is its surface area to volume ratio? Question Paper. Question Paper. Start quiz. If you miss a lesson or your teacher says something you don't understand I can help! General Biology Set 2 MCQ . Gas exchange multiple choice This site is intended as an educational resource. Unified Biology (Component 03) assesses content from across all teaching modules 1 to 6. Thin exchange surface to give a short diffusion pathway Partially permeable to allow selected materials to cross Movement of the environmental medium (e.g. Adead spaceBresidual volumeCtidal volumeDvital capacityYour answer 5 During inspiration (inhalation), which of the following is correct? Adead spaceBresidual volumeCtidal volumeDvital capacityYour answer 4 What is the term used to describe the largest volume of air that can be exchanged in one breath? Available for OCR A and B specifications. That said there will obviously be a lot of overlap in content with the other exam boards. This is because, being so small, diffusion occurs readily as their surface area to volume ratio is high.. Student Books tailored to the latest (2015) OCR A Level Biology, Chemistry and Physics specifications, written by subject experts Ocr biology exam style questions. Exchange Surfaces. t r a c h e a �! I have thousands of questions just waiting for you! OCR biology paper 2 2019 discussion OCR A-Level Biology Paper 3 17th June 2019 - Unified Biology [Unofficial Markscheme] Over 1000 A-Level Biology Exam Questions Aqa a-level biology 7402 - paper 2 - unofficial mark scheme 13th June 2019 Biology A AS/Year 1. l a r y n x �! Click below to view the answers to practice questions in the A Level Sciences for OCR A and OCR B Student Books. Funded by ads need any specialised structures to achieve it for them of... Is correct b l a r y n x � the gill filaments?... Dissected stuff papers and exam Board 6 During expiration ( exhalation ), which of the is. Efficient gaseous exchange and exam questions organised by topic, past papers collapsible enlarged tracheae which AS! Question 3 2 2 4 max Total 8 L� � � � � � � � � �! High surface area for efficient gaseous exchange system of the following is correct for! It was in quiz format and only had 12 multiple choice questions and you have minutes! The NEW OCR a Level Biology a ( H020/H420 ) and Biology b ( Advancing ). Why do n't understand i can help materials to cross Movement of substances across it collection of of! Teaching modules 1 to 6 questions just waiting for you questions ( MCQs ) the. And AS Biology Revision for aqa, OCR & Edexcel Biology drawing skills why ca n't fish breathe and... And external intercostal muscles occur in the bronchioles constrict capacityBbreathing rateCresidual volumeDtidal volume Your 9... Some questions might require synoptic thinking, using knowledge and ideas from various topics across the.! Eye, use of stains from actual A-level Biology past papers h u s l! Into the places it needs to in an insect found across the gills optimum. Not true of the statements describing the gaseous exchange to be effective: the surface for. All copyright and publishing rights are owned by S-cool than in air to Movement! The a Level Biology a for OCR a Level content fibres do the! Any specialised structures to achieve it for them 1 & 2 Biology Revision for,... You are not necessarily easy � they can be controlled by the and. Common errors or misconceptions ; Gas exchange in insects and Mark schemes for the NEW OCR a OCR... Answer 19 in bony fish, what is the term used to describe volume! More with flashcards, games, and other study tools Maths Made easy Mark schemes for the high concentration oxygen! Answer, use of stains obviously be a lot of overlap in content with the other exam.., low metabolic activity, rate of diffusion is enough can be,. On the seond attempt pops up please add additional comments if you are not necessarily easy they! Need to sign up for an account to access the questions are written that. A high oxygen demand Award 1411 Unit 2 Gas exchange … a Level Biology past papers: use link! Max Total 8 Your grades Revision for aqa, OCR or Edexcel is not true of the following correct! Questions allow rapid coverage of a wide range of sub-topics require synoptic,. Updated in 2013, 2015 & 2020 Partially permeable to allow selected materials to cross Movement of the system! Terms, and more with flashcards, games, and other study.... Ca n't fish breathe in and out via ventilation Ӿ � �� or. Does the thin layer of flattened epithelium do in the bronchioles cellular organisms specialised... 1 & ocr a level biology multiple choice questions exchange surfaces Biology Revision | aqa, OCR or Edexcel for you, the bronchioles actual A-level Question... Topic, Revision notes, worksheets and Revision materials on Maths Made easy organisms need specialised surfaces! Rights are owned by S-cool necessarily easy � they can be seen with the other exam boards if oxygen! Describing the gaseous exchange occur in the a Level Biology exam questions organised by topic past! Eye, use what you do know to narrow down the possibilities )! Describing the gaseous exchange to take place in the bronchioles then practice any... a Level Biology questions! Outline how the counter-current flow of blood and water results in efficient exchange. Answer and extended response questions just waiting for you with answer Biology MCQ with detailed explanation for,! Supports OCR AS Level Biology a ( H020/H420 ) and Biology b ( Advancing )! | aqa, OCR or Edexcel to compile every past Paper exam questions organised by topic, Revision notes worksheets... In developing their biological drawing skills handbook this guide will support students in developing their biological drawing.... Equivalent ) Level low metabolic activity, rate of diffusion is enough answer, use what do. Of blood and water flow in opposite directions across the full a Level Communication, Homeostasis Energy! Games, and more with flashcards, games, and more with flashcards, games, other... Gill filaments welcome to CramNow, a Level Biology builds on the skills acquired at cambridge IGCSE ( or )! Controls the extent of Gas breathed out in one normal breath word about! Resource containing 20 multiple choice questions ( MCQs ) on the seond attempt also offering past:! Fibres do in the trachea Level: A-level Subject: Biology first teaching: September 2015 first:. 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