4. The peripheral nervous system

Question 1

what are multi-polar nerves?

Answer 1

they have one axon and multiple dendrites.

usually most motor efferent neurons to the skeletal muscles.

Question 2

what are bipolar neurons?

Answer 2

the have one axon and one dendrite.
usually inter-neurons, including the eyes, ears and nose where they take impulses from the receptor cells to other neurons

Question 3

what are unipolar neurons?

Answer 3

they have one extension.
the cell body is to one side of the axon.
usually sensory afferent neurons which carry messages to the spinal cord

Question 4

what is the synapse

Answer 4

the junction which nerve impulses are passed across between two adjacent neurons.
impulses must cross the synapse