DP Biology (first assessment 2025)

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Question 19M.1A.HL.TZ2.26

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.HL.TZ2.26
Level HL Paper 1A Time zone TZ2
Command term Deduce Question number 26 Adapted from N/A
26.
[Maximum mark: 1]
19M.1A.HL.TZ2.26

In premature babies born earlier than the 30th week of pregnancy, type II pneumocytes are usually not fully developed, so they do not carry out their function normally. What is a possible consequence of this?

A. The number of alveoli reduces.

B. The size of the alveoli increases.

C. Capillary networks do not develop fully and oxygen is not absorbed.

D. Surface tension between alveoli does not decrease and the alveoli stick together.

[1]

Markscheme

D

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