Definition For Active Transport -

Examples of active transport include:

Human intestinal cells must absorb glucose even when the concentration inside the cell is already higher than in the gut. definition for active transport

is the biological process by which molecules or ions move across a cell membrane against their concentration gradient (i.e., from an area of lower concentration to an area of higher concentration). Because this movement opposes the natural direction of diffusion, it requires energy (usually in the form of adenosine triphosphate, ATP) and the assistance of specific carrier proteins or pumps . Examples of active transport include: Human intestinal cells

Cells often need to accumulate high concentrations of specific molecules to function. For example: definition for active transport