Physiology Part 1 Flashcards Preview

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Flashcards in Physiology Part 1 Deck (33)
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1

Ascending phase, influx of sodium

Depolarization

2

Descending phase, efflux of potassium

Repolarization

3

-90 mV

resting state (membrane polarized)

4

permeable to sodium ions
(what stage)

depolarization stage

5

Rapid diffusion of potassium to the exterior

Repolarization stage

6

Two gates of voltage gated sodium channel

activation and inactivation gates

7

T/F: Inactivation gate will not re-open until membrane potential is at or nearly at "resting membrane potential" level.

True

8

Term for most synapses (axon to dendrite)

axodendritic

9

Tunnels which connect cytosol of two cells for synaptic transmission

Gap junctions (connexons)

10

Do chemical synapses touch?

no, very close though

11

What is myelin made of?

fat

12

What are the 3 excitatory neurotransmitters?

Norepinephrine,
Glutamate,
Nitric Oxide

(eNGiNes excite me)

13

What are the inhibitory neurotransmitters?

Glycine, GABA, Serotonin, AcH, Dopamine
(GG SAD)

14

What do MS, PLS, and ALS all have in common?

Demyelinating diseases

15

Which has more presynaptic bulbs, spatial or temporal summation?

spatial (takes up more space)

temporal summation only has 1

16

pupil constriction

miosis

17

areas of greatest number of pain nociceptors

tip of tongue, lips, genitals, finger tips

18

encapsulated mechanoreceptors assessing pressure

end bulbs of KRAUSE

19

encapsulated mechanoreceptor,
multi-branched,
perception of temp and pressure

corpuscles of RUFFINI

20

Iggo Dome Receptors,
not encapsulated,
anterior spinothalamic tract,
hair follicles,
general touch

Merkel's discs

21

encapsulated fine touch receptors on non-hairy skin

meissner's

22

phasic receptor
quick adaptor
pressure, vibration
encapsulated

Pacinian Corpuscles

23

Receptors that are not encapsulated

Merkel's discs

24

Proprioception receptors

muscle spindels, Golgi Tendon Organs, and Golgi Tendon Reflex

25

Prevents excessive tension in a muscle

Golgi Tendon Reflex

26

Which has cholinergic receptors, sympathetic or parasym?

parasym (sym has adrenergic)

27

Absolute refractory

no action potential possible

28

Relative refractory

action potential available with increase potential

29

many synapses in a single cell

spatial summation

30

rapid succession of action potential, few synapses

temporal summation