DP Biology (first assessment 2025)

Question 22M.2.HL.TZ1.5a

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.2.HL.TZ1.5a
Level	HL	Paper	2	Time zone	TZ1
Command term	Outline	Question number	a	Adapted from	N/A

[Maximum mark: 1]

22M.2.HL.TZ1.5a

(a)

Outline a reason for the muscles being described as antagonistic.

[1]

Markscheme

cause opposite movements / pull in opposite directions / when one contracts the other relaxes;

Examiners report

Most candidates were able to outline what antagonistic muscles are. The term 'extended' was sometimes used instead of 'relax' which is the preferred term as it indicates passivity.

Syllabus sections

B. Form and function » B3.3. Muscle and motility (HL only) » B3.3.3. Role of the protein titin and antagonistic muscles in muscle relaxation

B. Form and function » B3.3. Muscle and motility (HL only) » B3.3.8. Internal and external intercostal muscles as an example of antagonistic muscle action to facilitate internal body movements

Question 22M.2.HL.TZ1.5a

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Syllabus sections

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