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Examen
AQA A-Level Biology - Tissue Fluid Question And Answers
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---3marzo 20242023/2024A+
- 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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