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Breathing and Exchange of Gasses
Define the following terms? a. Tidal volume b. Residual volume c. A...

Define the following terms? a. Tidal vo | 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 0, Question 1: . 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 1:

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

Answer:

The quantities of air the lungs can receive, hold or expel under different conditions are called pulmonary or lung volumes. Tidal volume or Residual volumes are one of them.

Tidal volume: It is the volume of air normally inspired or expired in one breath without any effort which is about 500 ml. in actual, only 350 ml (alveolar volume) air enters the lung alveoli for the gaseous exchange and the remaining 150 ml (dead space volume) fill the respiratory passage.
Residual volume: Some air always remains in the lungs even after forcible respiration, this amount of air is known as residual volume which is about 1500ml.
Asthma: It is a diseased condition in which airways become narrow and swells and can also produce extra mucus. These conditions can make difficulty in breathing, coughing, shortness of breath etc.

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?

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

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.

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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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