Exam 1 Flashcards
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Mature nervous tissue has little capacity to store ______ or _____
oxygen, sugar (glucose)
Mature nervous tissue has little ______ capacity
mitotic
2 different components of the nervous system, broken up by structure
CNS, PNS
CNS is made up of what?
Brain (encephalon), Spinal cord (Medulla spinalis)
PNS is made up of what?
12 cranial nerve pairs, 31 spinal nerve pairs = 86 total nerve trunks and Ganglia
Groups of neuron cell bodies clustered together in the PNS
ganglia
Part of the N.S. that innervates the skeletal musculature “skeletal muscles”
Somatic component of the N.S.
Somatic component is synonymous with…
Voluntary component
Includes both efferent and afferent nerve fibers
Somatic component of the N.S.
The chemical released by the somatic axon endings (cholinergic)
Acetylcholine
2 different components of the N.S. broken up by function
Somatic and Autonomic
Part of the N.S. that innervates the glandular epithelium, smooth, and cardiac musculature
Autonomic (Visceral) Component of the N.S.
The involuntary portion of the N.S.
Autonomic
Parasympathetic subdivision of the visceral component of the N.S. is known as
Vegative
Autonomic component of the N.S. involves ____ and ____ structures
CNS and PNS
The nerves (PNS) that carry efferent parasympathetic fibers are limited to:
Cranial nerves: III, VII, IX, X
Sacral nerves 2, 3, 4
places where we find nerves that carry parasympathetic info is known as a
craniosacral subdivision
Two efferent neurons that are utilized to reach the gland cell or muscle cell involved are the
preganglionic (first) and postganglionic (second)
Autonomic preganglionic (___) neuron is _____
first, long
Autonomic postganglionic (____) neuron is _____
second, short
Preganglionic parasympathetic neurons release
acetylcholine
postganglionic parasympathetic neurons release
acetylcholine
Autonomic component of the N.S. is said to be a _____ system
cholinergic
Fight or flight
Sympathetic subdivision of the visceral component of the N.S.