DP Biology (first assessment 2025)

Question 22M.1A.SL.TZ1.21

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.SL.TZ1.21
Level	SL	Paper	1A	Time zone	TZ1
Command term		Question number	21	Adapted from	N/A

21.

[Maximum mark: 1]

22M.1A.SL.TZ1.21

The image shows the changes in heart rate of an athlete during exercise.

[Source: Liddle, P.F., 2010. Heart Rate Variability (HRV) during exercise. [online] Available at: https://canute1.wordpress.com/2010/07/ [Accessed 1 August 2019].]

What is likely to have occurred between 0 and 4 minutes and between 24 and 28 minutes?

[1]

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Syllabus sections

C. Interaction and interdependence » C3.1. Integration of body systems » C3.1.12. Epinephrine (adrenaline) secretion by the adrenal glands to prepare the body for vigorous activity

C. Interaction and interdependence » C3.1. Integration of body systems » C3.1.14. Feedback control of heart rate following sensory input from baroreceptors and chemoreceptors

Question 22M.1A.SL.TZ1.21

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