Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
A calcium pump is a type of protein found in the cell membrane that uses energy to move calcium ions out of the cell against their concentration gradient.
Related terms
ATPase: This is an enzyme that provides energy for the transport process by hydrolyzing ATP (adenosine triphosphate).
Ion Gradient: This refers to a difference in ion concentration across a plasma membrane.
This is the movement of molecules across a cell membrane from an area of lower concentration to one of higher concentration, assisted by enzymes and requiring energy.