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ch 8 receptors and functions

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Alpha 1
located in peripheral blood vessels and causes constricted blood vessels when stimulated
Alpha 2
controls the release of the chemical neurotransmitters
Beta 1
located in the heart and fatty tissues and causes increased heart rate when stimulated
Beta 2
located in the bronchial smooth muscle and causes bronchodilation when stimulated
sympathetic system
produces an excitatory effect as in fight or flight syndrome
cerebral cortes
contains billions of neurons which control conscious mental activity
CNS
controls voluntary function
thalamus
relays sensory information to higher places in the brain
crebellum
controls balance or equillibrum
axons
longer nerve fibers which carry impulses away from the cell body
hypothalamus
controls huger, thirst, perspiration and shivering
ANS
controls involuntary functions
dendrites
shorter nerve fibers that bring impulses to the cell body
parasymphathetic system
produces a calming effect including lowering heart rate and respirations