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Chapter 30-- ANS Introduction

Terms in this set (12)

acetylcholinesterase
- enzymes responsible for the immediate breakdown of acetylcholine when released from the nerve ending
- prevents over-stimulation of cholinergic receptor sites
adregnergic receptors
receptor sites on effectors that respond to norepinephrine
alpha-receptors
adrenergic receptors that are found in SMOOTH MUSCLES
ANS (autonomic nervous system)
portion of the central and peripheral nervous systems that, with the endorcine system, functions to maintian internal homeostasis
beta-receptors
adregnergic receptors that are found in the HEART, LUNGS, VASCULAR SMOOTH MUSCLE
cholinergic receptors
receptor sites on effectors that respond to acetylcholine
ganglia
groups of closely packed nerve cell bodies
monoamine oxidase (MAO)
enzyma that breaks down norepinephrine to make it INACTIVE
muscarinic receptors
cholinergic receptors that also respond to stimulation by muscarine
nicotinic receptors
cholinergic receptors that also respond to stimulation by nicotine
PNS (parasympathetic nervous system)
- "rest and digest"
- contains CNS cells from cranium/sacral area of spinal cord, long pre-ganglionic axons, ganglia near/within the effector tissue, and short postganglionic axons that react with cholinergic receptors
SNS (Sympathetic nervous system)
- "fight or flight"
- CNS cells from THORACIC/LUMBAR areas
-short preganglionic axons, ganglia near spinal cord, long postganlionic axons that react with adrenergic receptors
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