NCERT Solutions for Class 11 Biology Chapter 17 - Breathing and Exchange of Gases

 

NCERT Solutions for Class 11 Biology Chapter 17 - Breathing and Exchange of Gases: As you have studied earlier, oxygen (O 2 ) is utilised by the organisms to indirectly break down simple molecules like glucose, amino acids, fatty acids, etc., to derive energy to perform various activities. Carbon dioxide (CO 2 ) which is harmful is also released during the above catabolic reactions. It is, therefore, evident that O 2 has to be continuously provided to the cells and CO 2 produced by the cells have to be released out. This process of exchange of O 2 from the atmosphere with CO 2 produced by the cells is called breathing, commonly known as respiration. Place your hands on your chest; you can feel the chest moving up and down.

You know that it is due to breathing. How do we breathe? The respiratory organs and the mechanism of breathing are described in the following sections of Class 11 Biology Chapter 17 - Breathing and Exchange of Gases of NCERT.

Here are the important topics of NCERT Class 11 Biology Chapter 17 - Breathing and Exchange of Gases mentioned below:

17.1 Respiratory Organs

    17.1.1 Human Respiratory System

17.2 Mechanism of Breathing

    17.2.1 Respiratory Volumes and Capacities

17.3 Exchange of Gases

17.4 Transport of Gases

    17.4.1 Transport of Oxygen

    17.4.2 Transport of Carbon dioxide

17.5 Regulation of Respiration

17.6 Disorders of Respiratory System

Inspiration and expiration are carried out by creating pressure gradients between the atmosphere and the alveoli with the help of specialised muscles – intercostals and diaphragm. Volumes of air involved in these activities can be estimated with the help of spirometer and are of clinical significance.

Respiratory rhythm is maintained by the respiratory centre in the medulla region of brain. A pneumotaxic centre in the pons region of the brain and a chemosensitive area in the medulla can alter respiratory mechanism.

After going through Chapter 17 - Breathing and Exchange of Gases, you must be able to answer the following questions:

  • Q1. What is the site of gaseous exchange in an insect?
  • Q2. Define the oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?
  • Q3. Have you heard about hypoxia? Try to gather information about it, and discuss with your friends.

If you have any query in answering these questions, then don't worry NCERT Solutions for Class 11 Biology Chapter 17 - Breathing and Exchange of Gases will help you in answering them by understanding the concept behind it.

Also, try to solve all the questions mentioned in the NCERT Book, with this you can clear your base. Solutions for NCERT Class 11 Biology Chapter 17 - Breathing and Exchange of Gases will help you in the preparation of other competitive exams like NEET and AIIMS along with your school exams.

NCERT Solutions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases- Solved Exercise Questions

NCERT Solutions for class 11 Biology

Chapter-1

The Living World

Chapter-2

Biological Classification

Chapter-3

Plant Kingdom

Chapter-4

Animal Kingdom

Chapter-5

Morphology of Flowering Plants

Chapter-6

Anatomy of Flowering Plants

Chapter-7

Structural Organisation in Animals

Chapter-8

Cell: The Unit of Life

Chapter-9

Biomolecules

Chapter-10

Cell Cycle and Cell Division

Chapter-11

Transport in Plants

Chapter-12

Mineral Nutrition

Chapter-13

Photosynthesis in Higher Plants

Chapter-14

Respiration in Plants

Chapter-15

Plant Growth and Development

Chapter-16

Digestion and Absorption

Chapter-18

Body Fluids and Circulation

Chapter-19

Excretory Products and their Elimination

Chapter-20

Locomotion and Movement

Chapter-21

Neural Control and Coordination

Chapter-22

Chemical Coordination and Integration

NCERT Solutions for Class 11- Subject wise

NCERT Solutions for Class 11 Biology

NCERT Solutions for Class 11 Maths

NCERT Solutions for Class 11 Chemistry

NCERT Solutions for Class 11 Physics

 

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