DP Biology (first assessment 2025)

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Question 22M.1A.HL.TZ2.25

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.HL.TZ2.25
Level HL Paper 1A Time zone TZ2
Command term Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
22M.1A.HL.TZ2.25

Changes in heart rate occur during and after a period of exercise.

 

Which structure sends messages to the sinoatrial node of the heart to cause changes in heart rate?

A. Adipose tissue

B. Medulla of the brain

C. Pineal gland

D. Thyroid gland

[1]

Markscheme

B

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