Set 17 Physiology Flashcards Preview

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Flashcards in Set 17 Physiology Deck (28):
1

What causes depolarization?

an influx of sodium

2

What causes repolarization?

efflux of potasium

3

When is the resting state?

before AP begins

4

What is the membrane potential during the resting state?

-90mV

5

When is the depolarization stage?

Na+ makes inside more positive

6

What is the membrane potential during the depolarization state?

0mV

7

What is the outside gate of the sodium channel called?

activation gate

8

What is the inside gate of the sodium channel called?

inactivation gate

9

Which gate of the sodium channel closes more slowly?

inactivation gate

10

When does the inactivation gate reopen?

when membrane potential is at or nearly at resting membrane potential

11

What does a presynaptic neuron do?

send the signal

12

What does a post synaptic neuron do?

receive the signal

13

What are most synapses?

axodendritic, from axon to dendrite

14

Where are gap junctions common?

visceral, smooth, and cardiac muscles

15

What is synaptic delay?

.5 m/sec

16

Are chemical synapses one way or two way?

one way

17

What are the excitatory transmitters?

norepinepherine, glutamate, and NO

18

What are the inhibitory transmitters?

ACh, dopamine, glycine, GABA, and serotonin

19

What are demyelinating diseases?

MS, PLS, and ALS

20

What do nocieceptors sense?

pain, tickle, itch, and temp

21

What are the two types of mechanoreceptors?

Krause and Ruffini

22

What do Krause receptors monitor?

pressure, encapsulated mechanoreceptor

23

What do corpuscles of ruffini monitor?

temperature, pressure, encapsulated and multi branched mechanoreceptor

24

What are the touch receptors?

Merkel's discs, Meissner's corpuscles, and Pacinian corpuscles

25

What do Merkel's discs monitor?

general touch, non-encapsulated

26

What do Meissner's Corpuscles monitor?

fine touch, located on non-hairy skin, encapsulated

27

What do Pacinian corpuscles monitor?

pressure, vibration, encapsulated

28

What receptor is a quick adaptor and phasic receptor?

pancinian corpuscles