Questions about neurons, including parts, types, and a specific disorder.

here are the answers to the questions about the neurons:

1.5.1 Part B is the cell body (or soma).

1.5.2

• a) Receives impulses and transmits it to part B: Dendrites
• b) Transmits impulses away from part B: Axon

1.5.3 The neuron represented by DIAGRAM 1 is a sensory neuron.

1.5.4 The type of neuron that serves as a link between the neurons in DIAGRAM 1 and 2 in the central nervous system is an interneuron (or relay neuron).

1.5.5 DIAGRAM 2 shows a structural defect of the neuron.

• a) Defect shown in the diagram: Degeneration/damage of the myelin sheath (at C).
• b) Effect of the defect on the transmission of impulse: The transmission of nerve impulses will be slowed down or disrupted/interrupted.
• c) Name of the disorder caused by this defect: Multiple Sclerosis (MS).