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Question 18M.1.HL.TZ2.36

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.HL.TZ2.36
Level HL Paper 1 Time zone TZ2
Command term Question number 36 Adapted from N/A
36.
[Maximum mark: 1]
18M.1.HL.TZ2.36

Neurons transmit electrical impulses. Which statement describes part of this process?

A. K+ ions are pumped out of the cell to depolarize the membrane.

B. Ion channels let K+ diffuse into the cell to depolarize the membrane.

C. Na+ ions are pumped into the cell to repolarize the membrane.

D. Ion channels let Na+ diffuse into the cell to depolarize the membrane.

[1]

Markscheme

D

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