Which is a Passive Transport Process

Question

Which is a passive transport process?
A)Phagocytosis
B)Pinocytosis
C)Receptor-mediated endocytosis
D)Osmosis
E)Ion pump

Accepted Answer

Osmosis is a passive transport process where water molecules move from high water potential to low water potential across a semi-permeable membrane without any energy expenditure from the cell. The other options listed are all forms of active transport processes where the cell expends energy to move molecules or particles across the cell membrane.