Cells Part II membrane potential and receptor signaling

Question 1

Cells in the body have a slight charge, similar to the charge of a battery. Cells that have this electric charge are called

Answer 1

polarized.

Question 2

is one that has an electric charge, and the charge is usually negative.

Answer 2

A polarized cell

Question 3

The movement of these sodium and potassium ions creates a negative resting membrane potential of =

Answer 3

-70 mV.

Question 4

An important transmembrane protein that was introduced in the previous section on plasma membrane structure is the

Answer 4

the receptor

Question 5

Another type of transmembrane protein receptor is one that is linked, or coupled to, a small intracellular (peripheral) protein called

Answer 5

G protein