DP Biology (first assessment 2025)

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Question 23M.1A.SL.TZ2.19

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ2.19
Level SL Paper 1A Time zone TZ2
Command term Question number 19 Adapted from N/A
19.
[Maximum mark: 1]
23M.1A.SL.TZ2.19

What occurs during inspiration?

A.  Internal intercostal muscles contract, increasing the pressure in the thorax.

B.  Internal intercostal muscles contract, decreasing the pressure in the thorax.

C.  External intercostal muscles contract, decreasing the pressure in the thorax.

D.  External intercostal muscles contract, increasing the pressure in the thorax.

[1]

Markscheme

C

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