Question

question 10/10
cholesterol does not dissolve in blood and into water - based body fluids. to be transported throughout the body, it must be associated with lipoproteins, macromolecules that are water - soluble. how can a cell take up cholesterol from its extracellular fluid?
a. endocytosis
b. active transport
c. exocytosis pump
d. facilitated diffusion

Explanation:

Fats are non - polar molecules and body fluids are water - based (polar). Amphipathic substances have both polar and non - polar regions. The non - polar part can interact with fat, and the polar part can interact with the aqueous body fluids, allowing fat to be transported. Other options like “active phase” (not a relevant term for fat transport), “molecular pump” (usually for ions or small molecules against concentration gradients, not fat), and “lipid - free medium” (can't transport fat as fat needs a medium with both polar and non - polar interaction ability) are not suitable for fat transport in aqueous body fluids.

Answer:

A. amphipats (assuming the option is about amphipathic substances which can transport fat as they have both polar and non - polar regions to interact with fat (non - polar) and water - based body fluids (polar))