The force that drives an ion through a membrane channel depends on the:
A) charge on the membrane.
B) difference in electrical potential across the membrane.
C) size of the channel.
D) size of the ion.
E) size of the membrane.

Question

Quizplus · Accepted Answer

The force that drives an ion through a membrane channel is determined by the difference in electrical potential across the membrane, known as the electrochemical gradient. This gradient is influenced by both the concentration gradient and the electrical potential gradient, which combine to determine the overall force on the ion. The other choices (A, C, D, and E) do not directly affect the driving force on the ion through the channel.

The Force That Drives an Ion Through a Membrane Channel