Thank you. Biology Revision - PMT - physicsandmathstutor Ocr a level biology exam questions by topic. 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 ? NEW OCR A Level Biology - Exchange Surfaces & Breathing. Goblet cells secrete mucus on the lining of the trachea to trap dust and microorganisms, cilia waft the mucus away from the lungs towards the throat, Smooth muscle, thin layer of flattened epithelium. Where does air enter the system in insects? Free timetable app ← Back to Library. Avital capacityBbreathing rateCresidual volumeDtidal volume Your answer 9 The air in the trachea, bronchi and bronchioles is termed the �dead space�. CIE A Level Biology 9700. 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? Athe main site of gaseous exchange in fishBa supporting structure for the gillsCa bony flap covering the gillsDa collection of blood vessels found in the gillsYour answer 20 Trout are a large bony fish found in the UK and are an important indicator species for the health of our rivers, lakes and estuaries. Created: Mar 26, 2016 | Updated: Feb 22, 2018. Close. A3:1B4:1C5:1D6:1Your answer 3 What is the term used to describe the volume of gas breathed out in one normal breath? 2 Water loss can be controlled by the opening and closing of spiracles. 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? This resource is a set of multiple choice questions to help students revise A Level Biology questions on gas exchange surfaces. What is the purpose of the soda lime? Unit of work, including PowerPoint lesson plans and student notes to print, as well as exam questions and mark schemes for some lessons. t r a c h e a �! A1B2C3D4 Your answer 13 Which one of the following is not true of the trachea? PLAY. A-level OCR biology past papers. 2 Diffusion of oxygen in water is slower than in air. l a r y n x �! 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? 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) b r o n c h u s B l a r y n x �! All Notes; Biology; Exchange and Transport; Exchange Surfaces Start Now . 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. A Level Biology OCR View topics (18) Topics. Why does diffusion not work in multicellular organisms? AQA GCE Biology AS Award 1411 Unit 2 Gas exchange Question 3 2 2 4 max Total 8 . YouTube. Designed for the CIE A Level Biology (9700) syllabus, for examinations from 2022 Model answers made by experienced teachers Why are light microscopes used to look at dissected stuff? AQA GCE Biology AS Award 1411 Unit 2 Gas exchange Gas Exchange Answers & Markscheme Question 1 Question 2 . A-level OCR biology past papers. STUDY. What does the ciliated epithelium do in the trachea? A and As Level Biology 9700 Cambridge International AS and A Level Biology builds on the skills acquired at Cambridge IGCSE (or equivalent) level. t r a c h e a �! 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 ? 3 Blood and water flow in opposite directions across the gills ensuring optimum levels of gaseous exchange. d) early metaphase. 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. Adead spaceBresidual volumeCtidal volumeDvital capacityYour answer 5 During inspiration (inhalation), which of the following is correct? p h a r y n x �! Ahumidifying the airBwarming the airCreducing surface tensionDpreventing dehydrationYour answer 17 Which polysaccharide is found in the exoskeleton and tracheae walls of most insects? Do prokaryotes need specialised exchange surfaces? 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. 1 The hard exoskeleton does not allow gaseous exchange to take place. 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. Molecules, Biodiversity, Food and Health Mark Scheme A Level Communication, Homeostasis and Energy Question Paper. Progress tracking for Multiple choice questions. Start quiz. 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. Where does most gaseous exchange occur in insects? They need 5-6 mg dm-3 dissolved oxygen for normal activity. 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 ? The questions are written so that the incorrect answers are plausible distractors based on common errors or misconceptions. 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. Adead spaceBresidual volumeCtidal volumeDvital capacityYour answer 5 During inspiration (inhalation), which of the following is correct? Exchange Surfaces. Created: Mar 26, 2016 | Updated: Feb 22, 2018. Start studying OCR AS Level Biology: Exchange Surfaces. Available for OCR A and B specifications. During mitosis, ER and nucleolus begin to disappear at . Small surface area to volume ratio, high metabolic rate, large distance between where the oxygen and carbon dioxide is and where it needs to be, Increased surface area, thin layer, good blood supply or ventilation to maintain gradient, Example of thing with increased surface area, Example of thing with good blood supply/ventilation, Components of the mammalian gaseous exchange system (Muscles etc), Cartilage, ciliated epithelium, goblet cells, smooth muscle, elastic fibres, Parts of the mammalian gaseous exchange system, Nasal cavity, trachea, bronchus, bronchioles, alveoli, Large surface area, good blood supply which warms the blood to body temperature, hairy lining to secrete mucus to trap dust, moist surfaces which increase the humidity to reduce evaporation from the exchange surfaces, Main airway carrying clean, warm and moist air from the nose down into the chest, Stops the trachea from collapsing, incomplete rings to allow food to move down the oesophagus behind the trachea. Both include multiple choice, short answer (structured questions, problem solving, calculations, practical) and extended response questions. How do collapsible enlarged tracheae which act as air reservoirs work? 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? 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 … Answer, use what you do n't understand i can help a donation cellular organisms need specialised exchange surfaces exchange... 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