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6 marksNervous Co-ordination

CAPE Biology Unit 2 · 2014 · Paper 2 · Question 5(b)(i)

Mammalian neurones in a resting state normally have a membrane potential of approximately -70 millivolts. If the plasma membrane is depolarized an action potential is generated. Outline the main steps in the depolarization phase of an action potential. [Note: details of repolarization are NOT required.]

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