# What is the type of cellular transport that moves substances against the concentration gradient?

Jan 15, 2016

Active transport moves substances against a concentration gradient.

#### Explanation:

A cell must often accumulate high concentrations of ions, glucose, or amino acids.

It usually has to use energy to move these substances across a membrane against their concentration gradients.

The process is called active transport.

It is aided by carrier proteins that act as pumps.

They use the energy from $\text{ATP}$ to move the solute against its concentration gradient.

The carrier proteins must have specific shapes that fit or bond well with their particular solutes.