Chapter 5 Action Potentials Flashcards Preview

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Flashcards in Chapter 5 Action Potentials Deck (12):
1

What is Nernst equation/ when there is no net flux

E= 61 X log (Kout/Kin) mV

Or

E= (1/Zx) X 61 X log (Xo/Xin)

2

Channels can be ___, ___, or ___ gated

Voltage, Ligand, chemically

3

Potassium wants to ___, sodium wants to go ___. Nernst potential shows what

Leave, go in

How badly sodium wants to come in or how badly K wants to leave

4

What is Goldman Hodgkin Katz equation

-61 X log
(CNai + PNa + (other ions present)/ CNaO + PNa)

P= permeability
C= concentration

5

Use ___ and ___ to repolarize cell faster

Potassium and chloride

6

Need to run sodium and potassium pump when. Why

When eating. Need glucose to give ATP for pumps

7

Potassium channels open ___ than sodium channels

Slower

8

Potassium has a lot more ____ at rest sodium

Conductance/permeability

9

Relative refractory period

Action potential can be generated by a stronger stimulus, below resting membrane potential

10

Absolute refractory period

No action potential can be generated, not below threshold

11

____ or ___ channel opening will hyperpolarize cell

Chloride or potassium

12

Depolarize a post synaptic cell by opening a ___ channel

Sodium