Chapter 15: Visceral Reflexes Flashcards Preview

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Flashcards in Chapter 15: Visceral Reflexes Deck (45)
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31

___ is secreted by nearly all ______ postgang neurons

NE; sympathetic

32

alpha adrenergic receptors

usually excitatory

33

beta adrenergic receptors

usually inhibitory

34

Which effects tend to last longer than the other?para or sym? why?

sympathetic; because Ach released by parasympathetics is broken down quickly in synapse

35

dual innervation

most viscera receive nerve fibers from both para and sympathetic divisions but don't innervate an organ equally

36

dual innervation has ___ effects that oppose each other and ____ effects that produce a unified overall effect

antagonistic and cooperative

37

An example of a cooperative effect is?

saliva

38

What effector only receive sympathetic fibers

adrenal medulla

39

metics:____ while lytics:_____ sympathetic activity

enhance; suppress

40

in ANS the cerebral cortex

has an influence: anger, fear, anxiety

41

in ANS the hypothalamus

nuclei for primitive functions such as hunger, thirst, sex

42

in ANS midbrain, pons, and medulla oblongata

salivation, swallowing, bladder control

43

vasomotor tone

a baseline firing frequency of sympathetics that keeps vessels in state of partial constriction

44

increase firing frequency

vasoconstriction

45

decrease firing frequency

vasodilation