DP Biology (first assessment 2025)

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Question 21M.1A.HL.TZ1.23

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.HL.TZ1.23
Level HL Paper 1A Time zone TZ1
Command term Question number 23 Adapted from N/A
23.
[Maximum mark: 1]
21M.1A.HL.TZ1.23

Which structural feature enables saltatory conduction?

A. Nodes of Ranvier between Schwann cells

B. Na+ channels under Schwann cells

C. K+ channels under Schwann cells

D. Sodium–potassium pumps under Schwann cells

[1]

Markscheme

A

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