Biology 9700 · AS & A Level · Homeostasis in mammals

Homeostasis in mammals — practice question

Fig. 1.1 shows a diagram of a kidney nephron together with some of its blood vessels.
(a)[4]

Using Fig. 1.1, complete Table 1.1 with letters A-G. Any letter may be used once, more than once, or not used at all.

(b)[5]

Describe and explain the adaptations of the cells of the proximal convoluted tubule for selective reabsorption.

(c(i))[2]

Describe the pattern shown in Fig. 1.2.

(c(ii))[1]

A person may sometimes have a low ADH concentration in the blood even when water potential changes. Suggest one circulatory effect of a low ADH concentration in the blood.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: efferent blood vessel labelled B

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