1. B3.2.1 The blood system GCSE items that can be used to define successful outcomes for peer and self assessment activities

2. Using Exam pro items to support successful outcomes Version 2.0 Copyright © AQA and its licensors. All rights reserved. Learners will be able to test their progress against learning outcomes using questions taken from past AQA GCSE examinations. B3.2.1 The blood system

3. Version 2.0 Copyright © AQA and its licensors. All rights reserved. B3.2.1 The blood system BLY3F-W-QP-JAN11Q3

4. Version 2.0 Copyright © AQA and its licensors. All rights reserved. B3.2.1 The blood system BLY3F-W-QP-JAN11Q3

5. Version 2.0 Copyright © AQA and its licensors. All rights reserved. B3.2.1 The blood system BLY3F-W-MS-JAN11Q3 questionanswersextra informationmark 3(a)(i)18 1 3(a)(ii)Z 1 3(b)(i)red blood cells 1 3(b)(ii)haemoglobin 1 Total 4

6. Version 2.0 Copyright © AQA and its licensors. All rights reserved. B3.2.1 The blood systemBLY3H-W-QP-JAN11

7. Version 2.0 Copyright © AQA and its licensors. All rights reserved. B3.2.1 The blood system BLY3H-W-QP-JAN11

8. Version 2.0 Copyright © AQA and its licensors. All rights reserved. B3.2.1 The blood system BLY3H-W-MS-JAN11 questionanswersextra informationmark 1(a)(i)brain 1 1(a)(ii) skin 1 1(a)(iii)1/25 or 4% or 0.04 or 1 in 25 or 1:25 or 1 out of 25 allow1 1(b)any two from:  increased / high heart rate / pulse rate  dilation / widening of arteries / arterioles (to skeletal muscles) or less blood flow to other organs  increased stroke volume / described do not allow pumps more blood unqualified accept vasodilation unqualified do not accept reference to veins / capillaries 2 1(c) more respiration / description or more energy required or to provide more energy respiration / process described → CO 2 CO 2 diffuses into blood ignore references to breathing do not accept anaerobic respiration 111 111 Total 8

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