ch. 12 Flashcards Preview

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Flashcards in ch. 12 Deck (97)
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31

two types of motor neurons

somatic motor neurons
visceral motor neurons

32

innervate skeletall muscles

somatic neurons

33

innervate smooth muscle, cardiac muscle and glands

visceral neurons

34

glial cells

neuroglial cells

35

supporting cells within nervous tissue

neuroglial cells

36

what is the role of the calcium ion in the synapse

enters synaptic knob triggering exocytosis of neurotransmitter into synaptic cleft

37

chemicals released by one neuron to affect the transmembrane potential of another

neurotransmitter

38

2 classes of neurotransmitter

excitatory
inhibitory

39

causes depolarization and promote generation of action potentials

excitatory

40

causes hyper polarization and suppress generation of action potentials

inhibitory

41

why is the classification of neurotransmitters not always precise

depends on the receptors not really the neurotransmitter- sperm going into woman

42

how many neurotransmitters ID

100

43

excitatory at all neuromuscular junctions

ACh

44

what effects ACh and what does it do

alzheimers- decrease ACh

45

typically excitatory

norepinephrine

46

increases arousal, dreaming and mood

norepinephrine

47

may be either excitatory or inhibitory

dopamine

48

dopamine and parkinson disease

decreases-causes stiffness

49

dopamine and nicotine

increases -pleasure

50

cocaine and dopamine

blocks repute of dopamine-causes a high

51

effects mood and emotional state

serotonin

52

inhibitory

serotonin

53

depression and serotonin

decreases

54

tryptophan and serotonin

increases serotonin-causes sleepiness

55

generally inhibitory

gaba

56

gaba in CNS

decreases anxiety

57

gaba and valium

increases receptor binding of gaba

58

how many neuroglial cells are found in CNS

4 types

59

how many neuroglial cells are found in PNS

2 types

60

fx: act as phagocytes
provide structural framework for neural tissue
help secrete and monitor composition of CSF
control interstitial environment within CNS
myelinate CNS axons

FX CNS