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Which statements describe examples of facilitated diffusion?

a. A kidney cell absorbs water molecules down their concentration gradient using a membrane protein.
b. A neuron allows sodium ions to enter the cell down their concentration gradient using a membrane channel.
c. A neuron moves sodium ions out of the cell against their concentration gradient using a membrane pump and cellular energy.
d. An epithelial cell absorbs amino acids against their concentration gradient using a membrane pump and the energy of another concentration gradient.
e. An inner ear hair cell allows potassium ions to flow down their concentration gradient after sound waves stimulate a membrane protein.
f. A bacterium takes in nitrogen gas directly through its plasma membrane from the atmosphere.

Respuesta :

Histrionicus

Answer:

The correct answer is option - A, B, and E.

Explanation:

Facilitated diffusion is a type of the diffusion of facilitated transport the movement of the molecule passively down their concentration gradient which is move in influence of another molecule through the membrane with help of pore or channel made up of the membrane protein.

A kidney cell absorbs water molecules down their concentration gradient using a integral membrane protein.

An inner ear hair cell permits potassium/calcium ions to move, down their concentration gradient after sound waves stimulate a integral membrane protein.

A neuron permits sodium/potassium ions to enter the cell down their concentration gradient using a integral membrane channel.

Thus, the correct answer A, B, and E.

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