Electrical Activity in Nerves - A NERVE CELL MEMBRANE HAS A SPECIFIC CHARGE – THE RESTING MEMBRANE POTENTIAL

Question 1

The Resting Potential is?

Answer 1

a Transmembrane Potential

Question 2

Transmembrane Potential what is it measured at in millivolts (mV)?

Answer 2

-70mV

Question 3

There is a slight difference in electrical charge between the _ _of the cell membrane compared

to the _ _of the cell membrane.

Answer 3

inside

outside

Question 4

THIS IS A CHARGE DIFFERENCE ACROSS THE CELL MEMBRANE.
Specifically, there is a negative charge on the _ _ of the membrane and a positive charge on the _ _ of the membrane.

Answer 4

inside

outside

Question 5

This charge is _ _ when muscle and nerve cells

are _ _ , or when a _ _ is not firing off an electrical charge and when a _ _ cell is not contracting.

Answer 5

present

at rest

nerve

muscle

Question 6

This charge difference is crucial for the functioning

of _ _and _ _ tissues. This means that: the resting potential must be present _ _ an electrical impulse can be created in the muscle or nerve cell.

Answer 6

nervous

muscular

before

Question 7

The primary cause of the Resting Potential is………….

Answer 7

potassium leaking out of the cells through K+ leakage channels that are always open.