Neuro Physio Flashcards

1
Q

More numerous in the brain

A

Glial cells

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2
Q

Produces CSF

A

Ependymal cells

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3
Q

Regulates ECF ion levels gives mechanical support; forms BBB

A

Astrocytes

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4
Q

Creates myelin in the CNS

A

Oligodendrocytes

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5
Q

Creates myelin in the PNS

A

Schwann cells

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6
Q

Dec Ach in the brain

A

Alzheimer’s Disease

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7
Q

Ach use what enzyme during synthesis?

A

Choline acetyltransferase

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8
Q

Ach is produce by

A

nucleus basalis of meynert (BG)

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9
Q

Dopamine is found in the

A

Substantia Nigra Pars Compacta
And Ventral tegmental Area
Hypothalamus-prolactin inhibiting factor (PIF)

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10
Q

Dopamine is degraded by

A

MAO in presynaptic nerve terminals

COMT in tissue

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11
Q

Activate/inhibits adenylate Cyclase

A

D1-activates (Gs)

D2-inhibit (Gi)

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12
Q

NE and Epi is secreted by

A

Pons-locus cerelius
BS
Hypothalamus

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13
Q

Serotonin (W) is secreted by

A

Median Raphe of the BS

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14
Q

Also called as happy hormones

A

Serotonin: from tryptophan

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15
Q

Serotonin is converted to

A

Melatonin in the pineal gland

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16
Q

Histidine is secreted in the

A

Tuberomamillary nucleus of the hypothalamus

17
Q

Histamine actions

A

Arousal
Sleep
Circadian rythm

18
Q

Glutamate has 4 receptor

A

3 ionotropic-NMDA, Kainate, AMPA

1 metabotropic-mGluR

19
Q

Nerve cells has 2 types

A

Neurons-permanent

Neuroglia/Glial cells/supporting

20
Q

Another AP can not be elicited, no mAtter how large the stimulus

A

Absolute Refractory Period

21
Q

No AP can occur until the Na inactivation gates open

A

Ionic Basis of Absolute Refractory Period

22
Q

Action potential can be elicited only if a larger than usual inward current is provided

A

Relative Refractory Period

23
Q

Membrane potential is closer to the K equilibrium potential and farther from threshold

A

Ionic Basic of a Relative Refractory Period

24
Q

When a cell depolarized slowly, Threshold potential is passed without firing an action potential

A

Accommodation

25
Synaptic inputs that depolarize the post synaptic cell ( opens Na and k chan)
EPSP-excitatory post synaptic potential
26
Synaptic inputs that hyperpolarize the post synaptic cell ( opens Cl chan)
IPSP-inhibitory post synaptic potential
27
2 or more presynaptic inputs arrive at post synaptic inputs arrive at post synaptic cell in rapid succession
Temporal Summation
28
2 or more presynaptic inputs arrive at post synaptic inputs arrive at post synaptic cell simultaneously
Spatial Summation
29
Repeated stimulation causes response of post synaptic cell to be greater than expected
Nerve Facilitation
30
Inc released of NT and inc sensitivity to the NT
Long term potentiation
31
Repeated stimulation causes dec response of post synaptic cell
Synaptic fatigue
32
NF that function as proprioception, somatic motor
Alpha a
33
NF that act as Touch, pressure
Alpha b
34
NF act as motor to muscle spindles
Alpha gamma
35
NF Actions are pain ,cold,touch
Alpha delta
36
NF of type alpha
Myelinated, bigger diameter | Faster,