DP Biology (first assessment 2025)

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Question 19M.1A.HL.TZ1.39

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1A.HL.TZ1.39
Level HL Paper 1A Time zone TZ1
Command term Identify Question number 39 Adapted from N/A
39.
[Maximum mark: 1]
19M.1A.HL.TZ1.39

The image shows a transverse section through a collecting duct in a vertebrate kidney.

[Source: Professor Peter Takizawa, Yale University]

How is the movement of materials across the wall of the collecting duct affected by the release of ADH from the pituitary gland?

A. There is increased movement of water in the direction of arrow I.

B. There is increased movement of sodium in the direction of arrow I.

C. There is increased movement of water in the direction of arrow II.

D. There is increased movement of sodium in the direction of arrow II.

[1]

Markscheme

A

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