DP Biology (first assessment 2025)

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Question 19M.1A.HL.TZ2.25

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.HL.TZ2.25
Level HL Paper 1A Time zone TZ2
Command term Determine Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
19M.1A.HL.TZ2.25

What causes the atrioventricular valves to close during a heartbeat?

A. Pressure in the atria is higher than in the ventricles.

B. Pressure in the atria is lower than in the ventricles.

C. Pressure in the arteries is higher than in the ventricles.

D. Pressure in the arteries is lower than in the ventricles. 

[1]

Markscheme

B

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