The diagram shows a motor neurone - Edexcel - GCSE Biology - Question 1 - 2013 - Paper 1
Question 1
The diagram shows a motor neurone.
(a) (i) Name the structures labelled A, B and C.
A
B
C
Worked Solution & Example Answer:The diagram shows a motor neurone - Edexcel - GCSE Biology - Question 1 - 2013 - Paper 1
A
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A is the nucleus, which contains the cell's genetic material and is responsible for regulating cell activities.
B
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B is the myelin sheath, which acts as an insulating layer that increases the speed of impulse transmission along the axon.
C
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C is the axon, which is a long projection that transmits electrical impulses away from the cell body to other neurons or muscles.
C (ii)
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C. Effectors are the structures (like muscles or glands) that receive signals from the motor neurone and respond accordingly.
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