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7.1 Hormones and coordination

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Question 4
F

In the early 1900s, two scientists carried out an experiment on a dog.

  • They cut all the nerves leading to the pancreas.
  • When food entered the small intestine, the pancreas still released digestive juice.
  • They then injected an extract made from the lining of the small intestine into the blood of the dog. The pancreas released digestive juice.
a.

Explain why the scientists cut all the nerves leading to the pancreas.

[2]
b.

Explain what the results of the injection show.

[2]
c.

Describe a suitable control for the injection.

[1]
d.

The pancreas also produces a hormone that controls the concentration of glucose in the blood.

Name this hormone.

[1]
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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