Science class 10th: Life Process

Life Process

Life Process :- All those activities of the body which protect the body from wear and tear and jointly do the work of maintenance are called biological processes.

Following are the processes involved in biological process:

1. Nutrition

2. Respiration

3. Transportation

4. Excretion

All living beings need energy to survive and perform various functions. This energy is obtained by the organisms through the process of nutrition. In this process a biochemical process called metabolism takes place in the cells and for its completion oxygen is needed which the organism obtains from its external environment. The use of oxygen in this process and the removal of carbon-dioxide (CO2) produced by it is called respiration. Some single-celled organisms do not require special organs to carry oxygen and carbon dioxide because their cells are directly in contact with the environment. But in multicellular organisms, there is a respiratory system for the exchange of gases and a transport system to reach their cells, which is called the circulatory system. When carbon sources and oxygen are used to obtain energy in chemical reactions, products are also formed that are not only unusable for the body’s cells, but they can also be harmful. It is very important to get these waste products out of the body. We do this Life Process.

It is called excretion. Since all these processes together do the work of maintenance of the body, hence they are called biological processes.

Also read:- Human Digestive System

Bio-chemical process

In all these processes, the organism receives energy from outside, that is, from the external energy source, and inside the body, the complex substances received from the energy source are disintegrated or formed. Due to which the molecules necessary for the maintenance and growth of the body are made. For this, a series of chemical reactions take place in the body, which is called biochemical process.

The process of Nutrition

Receiving energy from an external energy source (complex matter)

Decomposition of complex substances obtained from energy sources

Conversion of simple useful molecules by a biochemical process

Consume as energy

Re-occurrence of various biochemical processes

 Formation of new complex molecules (action of protein synthesis)

 Body growth and maintenance

General chemical methods for the dissolution of molecules:

The breakdown of molecules in the body occurs through a chemical mechanism called metabolism.

Metabolic activities are biochemical actions that take place in all living things to maintain life.

There are two types of metabolic activities.

(i) Anabolism:

It is a group of creative chemical reactions in which the energy generated by the process of catabolism is used to form complex molecules from simple molecules. By this process, all the essential nutrients are transported to other parts of the body as per the requirement, through which new cells or tissues are formed.

(ii) Catabolism:

In this process complex organic substances are broken down to form simple molecules and energy is created during cellular respiration.

The following are the processes under biological process, which together do the work of maintenance:

(1) Nutrition

(2) Respiration

(3) Transportation

(4) Excretion

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