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Chapter 11: Peripheral Nervous System

Terms in this set (59)

Somatic Motor Neurons
control skeletal muscles and voluntary movement
Autonomic Motor Neurons
controls smooth muscle, cardiac muscle, glands, and some adipose tissue
Autonomic nervous system consists of:
sympathetic and parasympathetic
parasympathetic
rest and digest
sympathetic
fight or flight
the autonomic division is under what type of control?
antagonist (one branch is excitatory and the other branch is inhibitory)
Antagonistic control example
Effector organ: Heart
sympathetic response increases heart rate
parasympathetic response slows rate
Differences between somatic and autonomic nervous systems
both have motor fibers, but somatic only stimulate skeletal muscle - motor fibers are usually heavily myelinated in somatic, thinly or unmyelinated in automatic - the target organs have different responses to neurotransmitters
T or F: most of the body's regulation/adaption of internal environments involves both muscle (somatic) and smooth, cardiac or gland functioning (autonomic)
True
Functions of the ANS
maintains internal conditions, has motor neurons that innervate smooth muscle, cardiac muscle and glands all throughout the body
Functions we are aware of in the ANS
upset stomach and full bladder
Functions we are not aware of in the ANS
artery constrictions and peristalsis
Two Neuron Chain
efferent pathway to ANS effectors
1st neuron of two neuron chain
PREganglionic neuron
2nd neuron of two neuron chain
POSTganglionic neuron
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