Question

.In most animal cells, which ion can move through "leak" channels in the

plasma membrane and, in so doing, establishes the resting membrane potential?
A. Cl-
B. K+
C. Na+
D. Ca2+

Answer 1

In most animal cells, potassium ions (K+) are able to move through leak channels, which help maintain the cell's electrical charge balance and concentration gradients.

Step-by-step explanation:

In most animal cells, potassium ions (K+) can move through leak channels. These channels allow ions to pass through the cell membrane without the need for energy input, thereby contributing to the maintenance of the cell’s electrical charge and the formation of a concentration gradient.

The sodium-potassium pump helps maintain a high concentration of K+ inside the cell and a high concentration of sodium (Na+) outside the cell by actively transporting these ions against their concentration gradients, using ATP as an energy source. Though sodium ions can also leak through channels, it is the K+ leak channels that are typically open, facilitating the movement of potassium ions out of the cell.