PNS nerves

Question 1

what does the PNS consist of?

Answer 1

nerves, sensory receptors, and ganglia

Question 2

what is a nerve?and what types are in the PNS?

Answer 2

a bundle of axons sheathed in c.t
nerves
cranial and spinal nerves

Question 3

what are cranial nerves?

Answer 3

12 pairs number i-xii
may be motor sensory or both

Question 4

what is the olfactory nerve?

Answer 4

i- smell (olfaction) -sensory

Question 5

what is the optic nerve?

Answer 5

ii- vision-sensory

Question 6

what is the oculomotor nerve?

Answer 6

iii- movements of eye and eyelid and pupil constriction-motor

Question 7

what is the trochlear nerve?

Answer 7

iv- eye movements looking downward-motor

Question 8

what is the trigeminal nerve?

Answer 8

v- sensory- from skin of face, teeth, gums
motor- muscles of mastication and tongue

Question 9

what is the abducens nerve?

Answer 9

VI- lateral eye movements - sensory

Question 10

what is the facial nerve?

Answer 10

VII- sensory- taste from 2/3 of tongue
motor- facial expression muscles lacrimal gland and salivary gland

Question 11

what is the vestibulocochlear nerve?

Answer 11

VIII- hearing balance and equilibrium -sensory

Question 12

what is the glossopharyngeal nerve?

Answer 12

IX- sensory- taste from posterior 1/3 of tongue and throat carotid artery BP
motor- salivary glands and swallowing muscles

Question 13

what is the vagus nerve?

Answer 13

X- visceral sensory and visceral motor for thoracic and abdominopelvic organs

Question 14

what is the accessory nerve?

Answer 14

XI- sternocleidomastoid and trapezius also muscles of pharynx and vocal cords - motor

Question 15

what is the hypoglossal nerve?

Answer 15

XII- tongue muscles- motor

Question 16

what are the spinal nerves?

Answer 16

31 pairs- emerge from intervertebral foramina
formed from ventral and dorsal root
mixed motor and sensory
spinal nerves branch from dorsal and ventral rami
ventral rami join laterally to form plexuses