Question

cells of the body mainly use ________ for the selective endocytosis of most macromolecules.
answer

• diffusion
• fluid - phase endocytosis
• receptor - mediated endocytosis
• pinocytosis
• i dont know yet

Explanation:

To solve this, we analyze each option:

• Diffusion is a passive transport of small molecules, not for macromolecule endocytosis.
• Fluid - phase endocytosis (pinocytosis) is non - selective uptake of fluid and solutes.
• Receptor - mediated endocytosis is a highly selective process where cells use receptors to take in specific macromolecules (like LDL, hormones, etc.).
• Pinocytosis is non - selective uptake of extracellular fluid, not for selective macromolecule uptake.

So the correct process for selective endocytosis of most macromolecules is receptor - mediated endocytosis.

Answer:

C. receptor - mediated endocytosis