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Flashcards in Qs Deck (15):
1

T/F: A patch is smaller than an axon segment and has a uniform potential.

True

2

The amplitude and rate of rise of the action potential are highly dependent on the external concentration of what ion?

Sodium (Na)

3

Which property of the membrane allows it to hold an enormous electrical charge?

Insulating Property

4

One can calculate the expected rate of change of membrane voltage from a current pulse using what equation?

Equation for Capacitive Current

5

The resting membrane potential (Vm) comes about through the actions of what?

Na/K Pump

6

What ions are simultaneously pumped into the cell?

Sodium (Na)

7

What ions are simultaneously pumped out of the cell?

Potassium (K)

8

T/F: "Leak channels cause an increase in the resting membrane potential.

False

9

Equilibrium potentials are calculated from what equation?

Nernst Equation

10

T/F: The equilibrium potential and the membrane potential are equal only under one special circumstance.

True

11

If a cell is only permeable to K ions, then what is the value of Vm?

EK

12

If a cell is only permeable to Na ions, then what is the value of Vm?

ENa

13

T/F: If the ion concentrations do not change, then ENa and EK do not change.

True

14

Many glial cells are only permeable to what ions?

Potassium (K)

15

Although a typical neuron is permeable to both Na and K ions, which of these ions is it far less permeable to?

Sodium (Na)