Peripheral nervous system

What does the peripheral nervous system consist of

All nervous tissue outside the central nervous system (cranial nerves, spinal nerves, sensory receptors, ganglia, etc)

What are the two of the six types of neuroglia found in the PNS and their function

Schwann cells-forms myelin sheath around axons

Satellite cells-provides structural support and regulate the exchange of material

What is a nerve and describe the organization of the nerve

a nerve is a bundle of axons and their neuroglia wrapped in connective tissue

Endoneurium- surrounds each axon

Perineurium- surrounds each bundle of axons

Epineurium- external layer of a nerve

Describe the three functional types of nerves 

Sensory (afferent) nerves- transmit information towards the CNS

Motor (efferent) nerves- transmit information away from the CNS

Mixed nerves- composed of sensory and motor neuron (transmit information in both directions)

Out of the twelve cranial nerves, what are cranial nerves 1-4, is it sensory, motor or mixed and their function

Cranial nerve 1- Olfactory nerve sensory. Its function is smell

Cranial nerve 2- Optic nerve (sensory) its function is vision

Cranial nerve 3- Oculomotor (motor)