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7.1 Hormones and coordination

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Question 31
H

A drug prevents the pituitary gland from responding to TRH. All other parts of the thyroxine control pathway initially function normally.

Which sequence is most likely?

[1]
A

TSH falls, thyroxine falls, TRH rises.

B

TSH rises, thyroxine falls, TRH rises.

C

TSH falls, thyroxine rises, TRH falls.

D

TSH rises, thyroxine rises, TRH falls.

Markscheme

7.1 Hormones and coordination Questions

  1. GCSE
  2. /Biology
  3. /7.1 Hormones and coordination

42 exam-style questions on Edexcel GCSE Biology 7.1 Hormones and coordination, covering 7.1.1 Endocrine glands and hormone transport, 7.1.2 Adrenalin and fight or flight, and 7.1.3 Thyroxine and negative feedback. Each one has a worked solution and a mark scheme showing where the marks go.

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