Because this movement goes against the "concentration gradient" (the natural tendency of particles to spread out), it does not happen spontaneously. To make it work, the cell must expend energy, usually in the form of . Active vs. Passive Transport: The Key Difference
Allowing your intestines to soak up every bit of glucose from your food, even when levels in your blood are already high. what is active transport in a cell
Active transport is a type of cellular transport mechanism that involves the movement of molecules or ions across a cell membrane from an area of lower concentration to an area of higher concentration, against the concentration gradient. This process requires energy, usually in the form of ATP (adenosine triphosphate), to pump the molecules or ions against their natural direction of movement. Maintaining the voltage needed for neurons to send
Maintaining the voltage needed for neurons to send signals throughout the brain and body. the cell must expend energy