Biology 0610 · IGCSE · Blood vessels

Blood vessels — practice question

An investigation examined blood flow in different regions of the body while resting and during mild exercise. Fig. 5.1 presents the results for the skeletal muscles, the skin and the alimentary canal.
(a(i))[1]

Use Fig. 5.1 to state the blood flow to the skeletal muscles at rest.

(a(ii))[2]

Use Fig. 5.1 to state the change in blood flow to the skeletal muscles from rest to mild exercise. Show your working.

(b)[3]

Suggest why the greater blood flow to the skeletal muscles is needed during mild exercise.

(c(i))[2]

Calculate the percentage rise in blood flow to the skin during mild exercise. Show your working.

(c(ii))[3]

Outline the reason for this greater blood flow to the skin.

(d)[1]

Suggest why blood flow to the alimentary canal falls during mild exercise.

(e)[2]

Suggest two reasons for this constant blood flow.

Worked solution & mark scheme

This 14-mark question has a full step-by-step worked solution and mark scheme. One marking point: 1.2 dm^{3} min^{-1}

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