Endosmosis is defined as the diffusion of water molecules into the cell from outside through the semipermeable cell membrane that causes swelling of the cell. This process occurs when the cell is placed in a hypotonic solution or in pure water.

Exosmosis is defined as the diffusion of water molecules out of the cell from inside through the semipermeable cell membrane that causes shrinkage of the cell. This process occurs when the cell is placed in a hypertonic solution.

Endocytosis involves the process of internalisation of particles into the cell by the process of invagination of the cell membrane, which results in the formation of vesicles or vacuoles. Amoeba obtains its food through this process.

Exocytosis is defined as the mechanism by which materials get discharged from the vacuoles by the process of fusion of the vacuoles with the cell membrane. It is the reverse mechanism of endocytosis. The examples of cells using this process are the secretion of proteins such as enzymes, peptide hormones and antibodies from different cells.

E M B I B E

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 1

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IMPORTANT

Earn 100

Define endosmosis.

Important Questions on The Fundamental Unit of Life

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9th CBSE

IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 1

Define exosmosis.

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9th CBSE

IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 1

Define endocytosis.

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9th CBSE

IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 1

Define exocytosis.

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IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 2

We eat food composed of all the nutrients like carbohydrates, proteins, fats, vitamins, minerals and water. After digestion, these are absorbed in the form of glucose, amino acids, fatty acids, glycerol, etc. What mechanisms are involved in absorption of digested food and water?

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CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 3

What are the consequences of the below given condition?
A cell containing higher water concentration than the surrounding medium.

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9th CBSE

IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 3

What are the consequences of the below given condition?
A cell having low water concentration than the surrounding medium.

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9th CBSE

IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 3

What are the consequences of the below given condition?
A cell having equal water concentration to its surrounding medium.

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9th CBSE

IMPORTANT

CORE SCIENCE BIOLOGY For Class 9>Chapter 1 - The Fundamental Unit of Life>EXERCISE - 1C>Q 4

If you are provided with some vegetables to cook, you generally add salt to the vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this?

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