Passive vs. Active Transport definitions Flashcards

Movement of molecules from high to low concentration without energy use.

Movement of molecules from low to high concentration requiring energy.

High-energy molecule used by cells to power active transport.

Transport protein moving a single molecule in one direction across a membrane.

Transport protein moving two or more molecules in the same direction across a membrane.

Transport protein moving two or more molecules in opposite directions across a membrane.

Barrier that separates the interior of cells from the external environment.

Difference in the concentration of a substance across a space.

Smallest unit of a chemical compound that can take part in a chemical reaction.

Protein that assists in moving substances across a cell membrane.