DP Biology (first assessment 2025)

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Question 21M.1A.HL.TZ2.25

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.HL.TZ2.25
Level HL Paper 1A Time zone TZ2
Command term Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
21M.1A.HL.TZ2.25

The diagram shows changes in pressure in the left atrium, left ventricle and aorta during a single cardiac cycle. At what point during the cycle does the atrioventricular valve close?

[1]

Markscheme

A

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