Question

4. Define the following terms: (i)Osmosis (ii)Endocytosis (iii) Diffusion *

Answer 1

Answer:

osmosis:

Osmosis is the movement of a solvent across a semipermeable membrane toward a higher concentration of solute (lower concentration of solvent). In biological systems, the solvent is typically water, but osmosis can occur in other liquids, supercritical liquids, and even gases.

Endocytosis:

Endocytosis is a cellular process in which substances are brought into the cell. The material to be internalized is surrounded by an area of cell membrane, which then buds off inside the cell to form a vesicle containing the ingested material.

Diffusion:

Diffusion is the process of movement of molecules under a concentration gradient. It is an important process occurring in all living beings. Diffusion helps in the movement of substances in and out of the cells.

Answer 2

Answer:

Osmosis :- it is the movement of solvent particles through the semipermeable membrane from lower concentration to higher concentration.

Endocytosis :- The flexibility of the cell membrane enables the cell to engulf food and other materials from its external environment. Such process is known as endocytosis.

Diffusion :- is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. One of the main characteristics of diffusion is the movement of molecules along the concentration gradient.

Explanation:

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