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7.1 Hormones and coordination

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Question 40
H

A person takes a substance that acts like thyroxine in the negative feedback pathway. The substance also raises metabolic rate.

What happens to TSH production and the thyroid gland's own thyroxine release?

[1]
A

TSH production decreases; thyroid thyroxine release decreases.

B

TSH production decreases; thyroid thyroxine release increases.

C

TSH production increases; thyroid thyroxine release increases.

D

TSH production increases; thyroid thyroxine release decreases.

Markscheme

7.1 Hormones and coordination Questions

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

89 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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