Topic 9 - Nervous System 1) Understand the structural...

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Nervous System 1) Understand the structural relationships between the CNS and PNS a. CNS is brain and spinal cord b. PNS is Cranial and spinal nerves i. Afferent/ efferent ii. ANS (signals to heart / smooth muscle)(sympathetic) 2) Explain the functional roles of the sympathetic and parasympathetic systems a. Sympathetic (autonomic) i. More active during stress 1. aCH, epi, norepi ii. Considered to be more PNS and less CNS iii. Nerves originate in vertebral column in the lateral horn 1. Thoracic and lumbar regions iv. Fight or flight (accelerates) b. Parasympathetic (autonomic) i. Cranial nerve 3,7,9,10 and sacral nerves ii. Rest and digest (brakes) iii. Only uses aCH 3) Explain the role of neurons and glial cells in the microanatomy of the system a. Perikaryon (main cell body) b. Nissel substance (Neuro transmitters) c. Axon (outgoing) d. Dendrite (incoming) e. Bipolar type (Two dendrites attached to perikaryon) i. Nasal epithelium/ retina f. Multipolar type (multiple dendrites attached to perikaryon)
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i. Most common, brain g. pseudounipolar (perikaryon is in the axon line)
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This note was uploaded on 04/03/2008 for the course BIOL 437 taught by Professor Plochocki,jeffreyoswalt,mark during the Spring '08 term at Pennsylvania State University, University Park.

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Topic 9 - Nervous System 1) Understand the structural...

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