Nerve Impulse Transmission

Question 1

What is the charge of a resting nerve cell?

Answer 1

-negative inside cell
-positive outside cell

Question 2

Resting potential

Answer 2

polarized (sodium on the outside and potassium on the inside)

Question 3

How do ions move throughout the cell

Answer 3

-leak channels
-sodium potassium pump during active transport

Question 4

Action Potentials

Answer 4

-cell must depolarize (let in sodium)
-increases resting potential from -70mV to threshold potential at -50mV -> nerve cell fires
-charge reaches +30mV
-K+ leaves cell to repolarize or return to resting state