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

Control and coordination in mammals — practice question

Fig. 9.1 shows a relaxed sarcomere in striated muscle.
(a(i))[2]

On Fig. 9.1, use label lines and letters to identify an actin filament with P and a myosin filament with R.

(a(ii))[2]

State what happens to the A-band and the I-band as the sarcomere contracts.

(b(i))[4]

Suggest how curare binding to receptors may result in muscle paralysis.

(b(ii))[2]

Suggest why the effect of curare may lead to the death of a mammal.

(ii)[2]

Suggest why the effect of curare may lead to the death of a mammal.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: P marks thin filament

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