A cell moves sodium ions against its concentration gradient. This is an example of ____.

Question

A cell moves sodium ions against its concentration gradient. This is an example of ____. ​

Quizplus · Accepted Answer

Active transport is the movement of molecules or ions against their concentration gradient, and requires the input of energy in the form of ATP. The movement of sodium ions against their concentration gradient requires active transport. Osmosis is the movement of water molecules across a membrane in response to a concentration gradient, diffusion is the movement of molecules or ions down their concentration gradient, facilitated diffusion is the passive movement of molecules or ions through a membrane protein, and diffusion through a channel is a specific example of facilitated diffusion.

A Cell Moves Sodium Ions Against Its Concentration Gradient