Ionic Equilibrium and Resting Membrane Potential

Question 1

What is membrane potential? (Em)

Answer 1

separation of charge across the membrane of excitable tissue at rest

Question 2

What is the the electrochemical gradient?

Answer 2

indicates combination of 2 forces chemical(concentration) and electrical (like charges repel and opposites attract)

Question 3

What type of channels would you describe NMDA channels.

Answer 3

They are both Voltage gated and ligand gated channels

Question 4

What are the endogenous ligands for the NMDA receptor?

Answer 4

glutamate and aspartate

Question 5

What is the equilibrium potential for K+?

Answer 5

-95mV

Question 6

What is the equilibrium potential for sodium?

Answer 6

+70mV

Question 7

What is the equilibrium potential for Cl-?

Answer 7

-76mV

Question 8

What is the equilibrium potential for Ca2+?

Answer 8

+125 mV

Question 9

Does hyperkalemia depolarize or hyperpolarize the cell?

Answer 9

depolarize

Question 10

Would hypokalemia hyper polarize or depolarize the cell?

Answer 10

hyperpolarize the cell

Question 11

Meaning of conductance. (g)

Answer 11

refers to the flow of an ion across the cell membrane

Question 12

Meaning of equilibrium potential.

Answer 12

Membrane potential that puts an ion in electrochemical equilibrium

Question 13

Meaning of net force?

Answer 13

the “driving force” driving the diffusion of an ion