Peripheral Nervous System Flashcards
1
Q
F/T: nerve axons wrapped in myelin sheath conduct signals SLOWER than unmyelinated axons
A
FALSE: conductance via Nodes of Ranvier (gaps in myelin sheath)
2
Q
What produces myelin in PNS?
A
Schwann cells
3
Q
PNS sensory receptor in the ear is:
A
Pacinian Corpuscles
Sensitive to pressure, touch, vibrational stimuli
surrounded by capsule
Nerve fibre in centre
4
Q
Three layers of nerve wrappings:
A
ENDOneurium - innermost, individual nerve fiber in the fascicle
PERIneurium - middle, wraps each individual nerve fascicle
EPIneurium - outermost, wraps nerve fascicles together
