RMP

Question 1

properties of cell membrane?

Answer 1

hydrophillic head, hydrophobic tail

Question 2

three main properties of cell membrane?

Answer 2

they conduct ions, recognize and select specific ions, open and close in response to signals

Question 3

Non-gated v.s gated channels?

Answer 3

non-gated are always open, gated channels are closed in a resting state(no movement of ions) and open during AP

Question 4

three major signal types for ion gated channels?

Answer 4

voltage, chemical, pressure

Question 5

potassium ion concentration inside and outside of a cell?

Answer 5

100 inside 5 outside

Question 6

sodium ion concentration inside and outside of a cell?

Answer 6

15 inside, 150 outside

Question 7

calcium ion concentration inside and outside of a cell?

Answer 7

.0002 inside, 2 outside

Question 8

does chloride want to go inside or outside of cell

Answer 8

outside

Question 9

what kind of channels do glial cells have?

Answer 9

only non-gated potassium channels

Question 10

what does it mean to be at equilibrium potential?

Answer 10

potential of an ion where chemical and electrical forces are equal opposite

Question 11

equilibrium potential of sodium?

Answer 11

+60 mV

Question 12

equilibrium potential of potassium?

Answer 12

-80 mV

Question 13

What does the NERNST equation calculate?

Answer 13

equilibrium potential when cell is permeable to a single ion species

Question 14

resting membrane potential of a neuron?

Answer 14

-65 mV

Question 15

is resting membrane potential closer to Ek or Ena

Answer 15

Ek

Question 16

what would happen if membrane is more permeable to sodium?

Answer 16

potential will continue to approach positive zero until it is inoperable

Question 17

Function of the sodium potassium pump?

Answer 17

maintains the concentration gradients required for neuronal function

Question 18

how does NaK pump regulate charge separation?

Answer 18

removes 3 Na from inside in exchange for 2 potassium on the outside

Question 19

how much of the bodies energy does the NaK pump require?

Answer 19

70%

Question 20

Describe the Goldman equation?

Answer 20

takes into account the permeability of each ion as well as the concentration gradient