Lecture 4 (Electrophysiology of Neurons)

Question 1

Normal potential difference in mammalian nerve fiber

Answer 1

-94mV

Question 2

Results from a difference in net charge in both sides of a membrane.

Answer 2

Diffusion potential

Question 3

Potassium concentration inside the nerve fiber as compared to the outside

Answer 3

Inside (K+) > outside (K+)

Question 4

Sodium conc. inside the nerve fiber in relation to outside conc.

Answer 4

Na+ inside < Na+ outside

Question 5

Diffusion potential level across a membrane that exactly opposes the net diffusion of a particular ion thru the membrane

Answer 5

Nernst potential