Neurons (8.1)

Question 1

Draw and label a:
a) sensory neuron
b) relay neuron
c) motor neuron

Question 2

Describe the roles of:
-Schwann cells
-axon
-dendrites
-nodes of ranvier
-cell body

Answer 2

Schwann cells = cells that form the myelin sheath
Axon = carries electrical impulses away from cell body
Dendrites = receive impulses from neighboring neurons and passes impulse through axon
Nodes of Ranvier = allow ions to diffuse in and out of the axon to maintain an electrical impulse
Cell body = contains the nucleus and controls the actions of the neuron