Multiple Choice
In which direction do particles in a solution move during passive diffusion?
14. Solutions
Osmosis
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Which statement best describes the role of the plasma membrane in osmosis?
A
The plasma membrane prevents any movement of water and solutes.
B
The plasma membrane selectively allows water to pass while restricting solute movement.
C
The plasma membrane allows the free passage of all solutes and water.
D
The plasma membrane actively pumps water across the membrane.
Verified step by step guidance1
Understand the concept of osmosis: Osmosis is the movement of water molecules across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.
Identify the role of the plasma membrane: The plasma membrane is a selectively permeable barrier that regulates the movement of substances in and out of the cell.
Recognize the selective permeability: The plasma membrane allows certain molecules, like water, to pass through while restricting others, such as solutes, based on size, charge, and other factors.
Consider the options given: Evaluate each statement based on your understanding of osmosis and the function of the plasma membrane.
Select the correct statement: The plasma membrane selectively allows water to pass while restricting solute movement, which aligns with the definition of osmosis and the function of the plasma membrane.
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