Exam 3 Part 5 Flashcards Preview

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Flashcards in Exam 3 Part 5 Deck (6)
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1

Autonomic nervous system

involuntary; conveys info from CNS to:
smooth muslce in organs, blood vessels, respiratory system
cardiac muscle (affects rate)
glands (sweat, salivary, some endocrine)

2

SNS vs ANS

sensory neurons-same: carry signal from PNS receptor to CNS
motor neurons are different

3

SNS motor neurons

1 neuron from CNS to effector (skeletal muscles)

4

ANS motor neurons

2 neurons
preganglionic neuron -axon extends from CnS to autonomic ganglion
glanglionic neuron-axon extends from autonomic ganglion to effector (smooth muscle or gland) or cardiac muscle

5

autonomic ganglia

located in head, neck, abdomen, and in chains along either side of spinal cord; synapses occur here
benefit: better communication and central

6

ANS divisions

has 2 divisions that differ in origin of preganglionic neurons and location of autonomic ganglion
sympathic and parasympathetic