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7.1 Hormones and coordination

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Question 44
H

Cells in a thyroid gland release thyroxine continuously and no longer respond to changes in TSH. Blood thyroxine remains above normal.

Which response is expected from the normally functioning hypothalamus and pituitary gland?

[1]
A

Less TRH and less TSH are produced.

B

Less TRH and more TSH are produced.

C

More TRH and less TSH are produced.

D

More TRH and more TSH are produced.

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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