Question 4 The capillary surface area of a child is 1.00 m2, of an adult woman is 1.5 m2, and of an adult man is 2.0 m2.

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Question 4 The Capillary Surface Area Of A Child Is 1 00 M2 Of An Adult Woman Is 1 5 M2 And Of An Adult Man Is 2 0 M2 1 (83.13 KiB) Viewed 59 times

Question 4 The capillary surface area of a child is 1.00 m2, of an adult woman is 1.5 m2, and of an adult man is 2.0 m2. The pulmonary blood volume per surface area is 271 ml/m2. Capillary blood volume is 25% of the pulmonary blood volume. a) Assuming capillaries are 8 um in diameter and have an average length of 1 mm, calculate the range of the number of open capillaries in the lung during rest for a child, an adult woman, and an adult man during rest. Hint: assume a capillary is a cylinder. [13 marks] b) After exercise the pulmonary blood volume triples due to vasodilation, and capillary blood volume increases to 50% of pulmonary volume. Calculate the number of capillaries perfused in the lungs during exercise. Justify your answer. [6 marks] c) What can you conclude from these estimates? [6 marks]