Question

Following are a few definitions of osmosis. Read carefully and select the correct definition.

• A. Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane
• B. Movement of solvent molecules from its higher concentration to lower concentration
• C. Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane
• D. Movement of solute molecules from lower concentration to a higher concentration of solution through a semipermeable membrane

Answer 1

The correct option is A

Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane

The correct option is A.

Explanation of the correct option:

1. Osmosis is a process in which pure water passes through a semi-permeable membrane from a dilute solution to a more concentrated solution in a lower concentration zone.
2. The term "semi-permeable" refers to a membrane that allows tiny molecules and ions to pass through while blocking larger molecules or dissolved substances.
3. The process of osmosis was first studied by Wilhelm Pfeffer in 1877.
4. Osmosis helps in maintaining the homeostasis of the body.
5. It is the process through which the water and minerals are absorbed inside the blood capillaries from the small intestine
6. It also plays an important role in the filtration of urine in the kidneys.
7. Thus, osmosis plays a vital role in the body.

Final answer: Osmosis is the movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.