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Breathing and Exchange of Gasses
Distinguish between (a) IRV and ERV (b) Inspiratory capacity and Exp...

Distinguish between (a) IRV and ERV (b | Class 11 Biology Chapter Breathing and Exchange of Gasses, Breathing and Exchange of Gasses NCERT Solutions

Welcome to the NCERT Solutions for Class 11 Biology - Chapter Breathing and Exchange of Gasses. This page offers a step-by-step solution to the specific question from Exercise 1, Question 13: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 13:

Distinguish between
(a) IRV and ERV
(b) Inspiratory capacity and Expiratory capacity
(c) Vital capacity and Total lung capacity

Answer:

(a)

Inspiratory reserve volume (IRV)

Expiratory reserve volume (ERV)

1. It is the maximum volume of air that can be inhaled after a normal inspiration.

2. It is about 2500 – 3500 mL in the human lungs.

1. It is the maximum volume of air that can be exhaled after a normal expiration.

2. It is about 1000 – 1500 mL in the human lungs.

(b)

Inspiratory capacity (IC)

Expiratory capacity (EC)

1. It is the volume of air that can be inhaled after a normal expiration.

2. It includes tidal volume and inspiratory reserve volume.

IC = TV + IRV

1. It is the volume of air that can be exhaled after a normal inspiration.

2. It includes tidal volume and expiratory reserve volume.

EC = TV + ERV

(c)

Vital capacity (VC)

Total lung capacity (TLC)

1. It is the maximum volume of air that can be exhaled after a maximum inspiration. It includes IC and ERV.

2. It is about 4000 mL in the human lungs.

1. It is the volume of air in the lungs after maximum inspiration. It includes IC, ERV, and residual volume.

2. It is about 5000 – 6000 mL in the human lungs.

Other Questions of Chapter Breathing and Exchange of Gasses

Name the important parts involved in creating a pressure gradient between lungs and the atmosphere during normal respiration.

Q: How is respiration regulated?

Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?

Cigarette smoking causes emphysema. Give reason.

Q: What happens to the respiratory process in a man going up a hill?

A fluid filled double membranous layer surrounds the lungs. Name it and mention its important function.

Q: Have you heard about hypoxia? Try to gather information about it, and discuss with your friends.

Q: What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air?
(i) pO2 lesser, pCO2 higher
(ii) pO2 higher, pCO2 lesser
(iii) pO2 higher, pCO2 higher
(iv) pO2 lesser, pCO2 lesser

Q: Explain the process of inspiration under normal conditions.

Define the following terms?
a. Tidal volume
b. Residual volume
c. Asthma

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Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

Read the question carefully and focus on the core concept being asked.
Reference examples and data from the chapter when answering questions about Breathing and Exchange of Gasses.
Review previous year question papers to get an idea of how such questions may be framed in exams.
Practice answering questions within the time limit to improve your speed and accuracy.
Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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