Question

(1) Cell membranes (plasma membranes) help organisms maintain__________ homeostasis by controlling what substances may enter or leave cells. (2) Some substances can cross a cell membrane through passive transport, while other substances can only cross a cell membrane through active transport. What is the difference between active and passive cellular transport?

Answer 1

Answer:

Explanation:

Active cellular transport:

• It is the movement of molecules against the concentration gradient  (from low concentration to high).
• Active transport requires expense of energy supplied by ATP.
• It is a rapid way to transport of large sized molecules.

Passive cellular transport:

• It is the movement of molecules along the concentration gradient (from high concentration to low).
• Passive transport does not require expense of energy.
• It is a slow process and small sized molecules get transprorted.