Skema bio test mac 2015

Section A

1. B2. D3. C4. D5. A/B6. C7. C8. B9. B10. D11. B12. D13. B14. D15. B16. B17. B18. C19. B20. C

Section B1.a) (i) Plama(ii) Red blood cell/ Erythrocyteb) Carry oxygenc) water/protein/clotting factor/hormoned) We) Have nucleus/ large in sizef) Produce at bone marrow/does not carry gasg) Blood clotting

2a) (i) X: ArteryY: VeinZ: Capilary(ii)X: carry oxygenated blood away from the heart to the tissues, except for pulmonaryarteriesY: responsible for returning deoxygenated blood back to the heartexcept for pulmonaryveinZ: the smallest of all blood vessels and form the connection between veins and arteries with one cell thick of wall which enable exchanging of gases, nutrient and waste material through it.(iii) The increased amount of smooth muscle that is found inarteriesgives them extra strength and elasticity to deal with the surges of blood and pressure from the heartb) prevent back flow of blood/ allow only one way flow of bloodc) coronary disease/ heart attack/ stroke/ angina

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