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Quiz One > Resting Membrane > Flashcards

Resting Membrane Flashcards

1
Q

Whats responsible for producing electrical potentials

A

Cellular mechanism

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2
Q

What’s an electrical potential

A

the difference in concentration of a charged
particle between one point and another.

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3
Q

What roduces current flow

A

Ep

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4
Q

when the charged particles flow from
one place to another through ion channels or membranes.
Is the definition of?

A

Current flow

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5
Q

Neurons communicate by producing Graded potential and Action potential

A

T

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6
Q

T/f to produce graded potential there must be Resting membrane potential

A

T

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7
Q

Electrochemical impulses are produced at

A

Membrane

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8
Q

electrochemical impulses are used to

A

Transmit signals

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9
Q

T or f
Changing in membrane potential in muscles activate many of the cell functions

A

T

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10
Q

Selectivity of ion channels is based on

A

Charge lining the channel
Size of channel

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11
Q

True or false
Most of ion channels are leaky

A

F, gated

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12
Q

activation gate on Na+ channel opens by

A

depolarization

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13
Q

The magnitude (amount) of a diffusion
potential is measured in

A

Mv

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14
Q

The magnitude (amount) of a diffusion
potential is dependent upon

A

size of concentration gradient

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15
Q

Size of this force is determined by

A

diffusion of
the charged ions.

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16
Q

The Nernst equation is used to calculate the

A

equilibrium potential

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17
Q

RMP is established by

A

diffusion potential

18
Q

Some gates are leaky, some are gated. Depending upon?

A

The POSITION of the gate

19
Q

True or false
Voltage gated channels are controled by membrane potential

A

True

20
Q

a diffusion
potential is caused by

A

Diffusion of iona

21
Q

diffusion potential magnitude is dependent upon

A

Size of concentration gradient

22
Q

True or false
Movement of ions across membrane causes flow of current

A

T

23
Q

Size of the electrical force is determined by

A

Diffusion of charged ions

24
Q

Equilibrium potential of k

A

94- w negativity inside and positivity outside

25
Q

Equilibrium potential for na

A

61 with positivity inside and negativity outside

26
Q

The Nernst equation is used to calculate?

A

equilibrium potential

27
Q

True or false
Nernst equation converts concentration difference of an ion into a voltage

A

T

28
Q

…..equation is used to determine the resting membrane potential
(RMP) in the cell with involvement of Na, K and Cl ions

A

Ghk

29
Q

The voltage difference across the cell membrane of
excitable cells with negativity inside and positivity outside when membrane is not responding to any stimulus is called

A

Rmp

30
Q

RMP is established by

A

diffusion potential

31
Q

True or false
Ions with highest permeability will make greatest
Contribution to rmp

A

True

32
Q

True or false
In resting condition more leaky K+ channels
are open than Na+

A

T

33
Q

RMP (-90) is closer to EP of K (-94) because of its

A

High premeability

34
Q

For generation of resting
membrane potential (RMP) only K leaky channels and Na-K pump are important

A

True

35
Q

Having a membrane potential does
make membrane excitable

A

F

36
Q

Excitability depends upon the

A

possibility of depolarization

37
Q

True or false
Cation is more effective in changing Vm

A

F. Both cations and anion are equally affective in changing Vm

38
Q

How is a graded potential produced

A

stimulation causing opening of ligand or mechanism gated channel

39
Q

……the part of neuron from
where axon arises

A

Axon hillock

40
Q

The electrical difference across the
membrane is measured by using a

A

Microelectrode

41
Q

What activates glands celk functions

A

Change in membrane potential

42
Q

What type of signals are graded and action potential

A

Electrical

Quiz One (9 decks)

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