AP BIOLOGY

Detailed explanation-1: -Primary active transport is also called direct active transport or uniport. It involves using energy (usually ATP) to directly pump a solute across a membrane against its electrochemical gradient.

Detailed explanation-2: -Active transport: moving against a gradient To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.

Detailed explanation-3: -Pumps are a kind of active transport which pump ions and molecules against their concentration gradient. Active transport requires energy input in the form of ATP.

Detailed explanation-4: -Active transport is the energy-requiring process of pumping molecules and ions across membranes against a concentration gradient. Active transport processes help maintain homeostasis.

Detailed explanation-5: -There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.