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12 Cards in this Set
- Front
- Back
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CNS - Central Nervous System
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within the brain and spinal cord
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PNS - Peripheral Nervous System
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cranial nerves (I-XII, emerging from base of brain into skull) & spinal nerves outside of the CNS (brain/spinal cord). Spinal nerves emerge from spinal cord out of the vertebra via IVF 1-31
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Ganglia
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PNS Nerve Cell Bodies
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Peripheral Nervous System Divisions
Somatic (SNS) |
sensory from the periphery to the CNS, and, motor from the CNS to the periphery (to the muscles); voluntary
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Peripheral Nervous System Divisions
Enteric Nervous System(ENS) |
Independent. Stim. by changes w/in gut i.e. chemical/stretch
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Peripheral Nervous System Divisions
Autonomic Nervous System (ANS) |
involuntary. Div. into opposing sympathetic/parasympathetic. Sensory from viscera but consisting mostly of motor to smooth muscle, cardiac muscle, gland secretion
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Autonomic Nervous System (ANS) Divisions
Sympathetic (thoracolumbar) |
with thoracic and lumbar cell bodies. preganglionic fiber short. Postganglionic fiber long.Fight/Flight. EPi and NE adrenal gland prod. Dilate pupils and bronchioles, raise HR, dilate blood vessels of cardiac, skeletal muscles, brain, lungs. Increase glycogenlysis (liver glycogen to glucose for energy) constriction of skin, nonessential blood vessels. Down in motility of GI tract
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Autonomic Nervous System (ANS) Divisions
ParaSympathetic (craniosacral) |
with cranial and sacral cell bodies (ganglion). Rest and digest. mnemonic - 1(0)973 - for cranial nerves that carry it. Think ConStricts/CranioSacral
Preganglionic fibers are long, postganglionic are short (therefore near effector organ). Constrict pupils, bronchioles, lower heart, raise GI tract motility |
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ANS Neurotransmitters
Cholinergic - Acetylcholine |
All pre-ganglionic, sympathetic & parasympathetic, All post-ganglionic parasympathetic, Occasional/few post-ganglionic sympathetic fibers, Acetylcholinesterase (AchE) inactivation.
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ANS Neurotransmitters
Adrenergic - Norepinepherine |
postganglionic sympathetic fibers Most
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Neutotransmitters and Receptors
Sympathetic |
Pregangionic fibers (short) always cholinergic. Postganglionic fibers (long) mostly adrenergic, a few cholinergic (glands
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Neurotransmitters and receptors
Parasympathetic |
Pregangionic fibers (long) always cholinergic. Postganglionic fibers (short) always cholinergic
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