Homework Answers
Na+/K+ ATPase transports Na+ and K+ across the membrane against the concentration gradient using the energy of ATP.
passive transport does not require energy.
active transport requires energy and molecules are transported against the concentration gradient.
osmosis is the movement of water molecules across the semipermeable membrane from its higher concentration to lower concentration.
endocytosis is the uptake of molecules or substances from outside the cell to inside the cell via an endocytic vesicle.
so the answer is b) active transport.
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