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3.2 Coordination and control – the endocrine system

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Question 12

In modern livestock farming, veterinarians use hormone-releasing intravaginal devices to synchronise the oestrus cycles of a herd. These devices continuously release a hormone that suppresses the release of follicle-stimulating hormone (FSH) and luteinising hormone (LH) from the pituitary gland, thereby preventing follicle maturation and ovulation.

Which hormone is used in these devices to maintain this negative feedback state?

A

Luteinising hormone (LH)

B

Follicle-stimulating hormone (FSH)

C

Progesterone

D

Oestrogen

Markscheme

3.2 Coordination and control – the endocrine system Questions

  1. GCSE
  2. /Biology
  3. /3.2 Coordination and control – the endocrine system

84 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.

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