Difficulty: Medium
Average Score: 79%
Entry Exam
What is the term for movement of water across a cellular membrane?
Correct answer
A
Rationale
Correct Answer: A - Osmosis
Rationale:
1. Osmosis is the movement of water across a selectively permeable membrane from an area of low solute concentration to high solute concentration.
2. Water moves passively to equalize solute concentrations on both sides of the membrane.
3. Facilitated diffusion (B) involves the use of transport proteins, not specific to water movement.
4. Diffusion (C) is the movement of solutes, not specific to water.
5. Active transport (D) requires energy to move molecules against their concentration gradient, different from osmosis.
Rationale:
1. Osmosis is the movement of water across a selectively permeable membrane from an area of low solute concentration to high solute concentration.
2. Water moves passively to equalize solute concentrations on both sides of the membrane.
3. Facilitated diffusion (B) involves the use of transport proteins, not specific to water movement.
4. Diffusion (C) is the movement of solutes, not specific to water.
5. Active transport (D) requires energy to move molecules against their concentration gradient, different from osmosis.