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AQA A-Level Biology - Tissue Fluid Question And Answers
AQA A-Level Biology - Tissue Fluid Question And Answers
1 (a) (i) An arteriole is described as an organ. Explain why.
(1 mark) - ANS Made of different tissues.
(ii) An arteriole contains muscle fibres. Explain how these muscle fibres reduce blood flow to capillaries.
(2 marks) - ANS As muscle contracts, arteriole narrows, reducing size of lumen.
(b) (i) A capillary has a thin wall. This leads to rapid exchange of substances between the blood and tissue fluid. Explain why.
(1 mark...
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