Question

why do active transporters need energy, but membrane transport proteins that use passive transport do not? question 9: all cells control whether membrane proteins are opened or closed and prevent materials from moving in and out freely. list each of the membrane transport proteins in the intestinal cells from the

Explanation:

Active transport moves substances against their concentration gradient, requiring energy (usually ATP). Passive transport, like diffusion or facilitated diffusion, moves substances down their concentration gradient, so no additional energy input is needed. For the second - part, common membrane transport proteins in intestinal cells include sodium - glucose symporters (for active transport of glucose), aquaporins (for passive water transport), and various ion channels (for passive ion transport).

Answer:

Active transporters need energy because they move substances against the concentration gradient. Passive transport proteins don't need energy as they move substances down the concentration gradient. Common membrane transport proteins in intestinal cells: sodium - glucose symporters, aquaporins, ion channels.