Edexcel IAL Biology 8.1 Sensory, relay and motor neurones

Use cell-body position and impulse direction to classify the neurone, label each structure precisely and connect Schwann-cell myelin to axon insulation.

Exam points

Label dendrites, cell body, axon, terminals and myelin on neurone diagrams.
Classify sensory, relay or motor neurones from structure and impulse direction.
Identify Schwann cells as the cells that produce myelin around peripheral axons.

[Maximum number: 1]

Many predatory animals produce toxins to disable their prey. Some of these toxins inhibit nervous communication.

Nerve impulses are transmitted along axons. Some axons are myelinated.

Which type of cell produces myelin?

neurone

rod cell

Schwann cell

lymphocyte

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8.1—Neurone structure and function question 1