Test 3- Peripheral Nervous System Flashcards
Respond to touch, pressure, stretch, vibrations, and itch
mechanoreceptors
Respond to temperature change
Thermoreceptors
Respond to chemicals in solution
Chemoreceptors
Responds to light
Photoreceptors
Respons to harmful stimuli that result in pain
Nociceptors
Contains all the cranial nerves and all the spinal nerves
PNS Anatomy
How many pairs of cranial nerves?
12
Carry impulses form the PNS to the spinal cord and from the spinal cord to the PNS
31 Pairs of spinal nerves
What are the two divisions of the PNS
Somatic nervous system
Autonomic nervous system
Carries impulses from the CNS to the skeletal muscle and involves mostly voluntary control
Somatic Nervous System (SNS)
Carries impulses from CNS to smooth muscles on organs, cardiac muscles, and glands (visceral effectors)
Autonomic Nervous System (ANS)
Cranial Nerve I
Olfactory nerve
Cranial Nerve II
Optic Nerve
Cranial Nerve III
Oculomotor Nerve
Motor nerve that innervates four of the extrinsic eye muscles
Oculomotor Nerve
Cranial Nerve IV
Trochlear
Motor nerve that innervates one of the extrinsic eye muscles
Trochlear
Cranial nerve V
Trigeminal
Has 3 branches, providing sensory innervation from the face and motor innervation to the chewing muscles (mixed nerve)
Trigeminal
Cranial nerve VI
Abducens
Motor nerve that innervates the muscle that abducts the eyeball
Abducens