The Autonomic Nervous System Flashcards
1
Q
Motor subdivision of the peripheral nervous system that functions without awareness or attention. Innervates cardiac muscle, smooth muscle, and glands. Uses two-neuron chains to reach its effectors.
A
Autonomic Nervous System
2
Q
The cell body of the first neuron in an ANS chain. Resides in the brain stem or spinal cord.
A
Preganglionic Neuron
3
Q
A thin, lightly myelinated fiber. Synapses with the second neuron.
A
Preganglionic Axon
4
Q
The second motor neuron of an ANS chain.
A
Postganglionic Neuron
5
Q
A thin, nonmyelinated fiber. Synapses with an effector organ.
A
Postganglionic Axon
6
Q
Neurotransmitter released by autonomic postganglionic parasympathetic fibers.
A
Acetylcholine
7
Q
Neurotransmitter released by autonomic postganglionic sympathetic fibers.
A
Norepinephrine
