Question

two important passive processes for membrane transport are ______.
○ pinocytosis and receptor - mediated endocytosis
○ diffusion and filtration
○ exocytosis and phagocytosis
○ facilitated diffusion and active transport

Explanation:

1. Analyze each option:

• Option 1: Pinocytosis and receptor - mediated endocytosis are active (endocytosis) processes, not passive.
• Option 2: Diffusion (movement of molecules from high to low concentration) and filtration (movement of solutes and solvents through a membrane due to pressure differences) are both passive membrane transport processes as they do not require energy.
• Option 3: Exocytosis and phagocytosis are active (exocytosis and endocytosis - phagocytosis is a type of endocytosis) processes.
• Option 4: Active transport requires energy, so this option is incorrect as it includes active transport along with facilitated diffusion (which is passive).

Answer:

B. diffusion and filtration