Biology 9700 · AS & A Level · Control and coordination in mammals

Control and coordination in mammals — practice question

Fig. 1.1 shows part of a neurone membrane when it is at resting potential.
(a(i))[3]

Using Fig. 1.1 as a reference, name A, B and D.

(a(ii))[1]

Substance C is needed for structure A to work. Name substance C.

(b)[5]

Suggest and describe what happens immediately at a neuromuscular junction or cholinergic synapse after each drug acts.

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This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A = sodium-potassium pump (CON if channel mentioned)” …

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