Question

Molecule X is a large protein, present in higher concentration in the extracellular fluid (ECF) than in the intracellular fluid (ICF). Which of the following is the most likely means of getting molecule X from the ECF to the ICF?

A. Primary active transport.
B. Secondary active transport.
C. Facilitated diffusion.
D. Ligand-Gated ion channel.

Answer 1

The most likely means of getting molecule X from the ECF to the ICF is through facilitated diffusion. Facilitated diffusion is a form of passive transport that utilizes specific protein channels in the membrane to move molecules down their concentration gradient.

Step-by-step explanation:

The most likely means of getting molecule X from the ECF to the ICF is through facilitated diffusion. Facilitated diffusion is a form of passive transport that does not require energy and utilizes specific protein channels in the membrane to move molecules down their concentration gradient. In the case of molecule X, it is a large protein that cannot pass through the plasma membrane directly, so it needs the help of carriers or channels for transport.