Question

Ions that move across the cell membrane from low concentrations to high concentrations are most likely:

a. diffusing through ion channels.
b. using energy during the process of active transport.
c. moving through a protein.
d. both (a) and (b).

Answer 1

The ions that move from low to high concentrations across the cell membrane likely use energy during active transport.

Step-by-step explanation:

The ions that move across the cell membrane from low concentrations to high concentrations are most likely using energy during the process of active transport. Active transport is the movement of substances across a cell membrane against their concentration gradient, which requires energy. This process is carried out by specific protein channels in the membrane. Therefore, the correct answer is (b) using energy during the process of active transport.