# Life Sciences Paper 1, November 2024, question 3.4.1(b)

> The diagram below shows how the level of a hormone in the blood is kept... Marked mark by mark. Q3.4.1(b), Life Sciences Paper 1 November 2024, 1 mark.

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Last updated: 2026-11-12

Subject: Life Sciences. Source: Based on Nov 2024 · Paper 1 · Q3.4.1(b). Marks: 1. Not yet checked by a teacher.

## Question 3.4.1(b) (1 mark)

The diagram below shows how the level of a hormone in the blood is kept steady by the pituitary gland and a gland in the neck. Name the gland labelled P in the diagram.

Figure: Flow diagram: gland P on the left and the pituitary gland on the right. A high level of thyroxin leads (dashed arrows) to less TSH from the pituitary; a low level of thyroxin leads (solid arrows) to more TSH. Name gland P.

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