Question

.When Na+ channels are opened in an animal cell, what happens to the

membrane potential?
A. It stays the same.
B. It becomes less negative.
C. It becomes more negative.

Answer 1

When Na+ channels are opened in an animal cell, the membrane potential becomes less negative as Na+ ions rush into the cell, causing depolarization. Hence the correct answer is option B

Step-by-step explanation:

When Na+ channels are opened in an animal cell, the membrane potential becomes less negative. This is because the concentration of Na+ ions is higher outside the cell than inside, causing Na+ ions to rush into the cell. Since Na+ is a positively charged ion, it changes the relative voltage immediately inside the cell relative to immediately outside, depolarizing the membrane and moving the membrane potential closer to zero.

Hence the correct answer is option B