Question

Which method facilitates the movements of water molecules ?

a) simple diffusion
b ) facilitated diffusion
c) osmosis
d) active transport
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Answer 1

Answer:

The water molecules move across the cell membrane by travelling along the concentration gradient of the solution (low to high).

Explanation:

Osmosis is the process in which a solvent moves from a solution of low concentration to a solution of higher concentration .

A gradient is followed for this movement and once the concentration of both the solutions(on either sides of the membrane) becomes equal the solvents stop flowing.

Now consider two solutions A and B.

A - is dilute

B - is concentrated

They are both separated by a cell membrane.

Water(solvent) molecules travel from A across the cell membrane / semi permeable membrane to B until the concentrations of A and B become equal

Answer 2

The method that facilitates the movement of water molecules is- c) osmosis.

• Osmosis is a type of diffusion in which water molecules move from a region having a low concentration of solute to a region having a high concentration of solute through a semi-permeable membrane.
• The proteins present on membranes called membrane proteins help in the movement of water molecules and it does not require energy.
• For example- the plant roots absorb water and minerals from the soil with the help of osmosis.