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Match the term with the correct definition.
Depolarization...
a. small change in resting membrane potential confined to a small area
b. charge difference across the plasma membrane when the cell is in an unstimulated state
c. larger change in resting membrane potential that spreads over the entire surface of a cell
d. membrane becomes more positive when Na+ diffuses into cell
e. return to resting membrane potential

Respuesta :

The correct definition of depolarization (a). small change in resting membrane potential confined to a small area.

  • The resting potential is produced by the electric charge that the ions are carrying. The three most significant contributors are chlorine, sodium, and potassium (K+) ( Cl-). The difference in charge between the two sides of the membrane determines the resting membrane potential when the concentration of these ions is balanced by the flow of ions via the membrane's ion channels.
  • An incoming action potential that opens the ion channels and depolarizes the membrane can cause the membrane potential to increase.

The membrane has not been depolarized, as evidenced by the resting membrane potential.

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