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Breathing and Exchange of Gasses
State the volume of air remaining in the lungs after a normal breathin...

State the volume of air remaining in the | 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 2: . 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 2: State the volume of air remaining in the lungs after a normal breathing.

Answer:

The volume of air remaining in the lungs after a normal expiration is known as functional residual capacity (FRC). It includes expiratory reserve volume (ERV) and residual volume (RV). ERV is the maximum volume of air that can be exhaled after a normal expiration. It is about 1000 mL to 1500 mL. RV is the volume of air remaining in the lungs after maximum expiration. It is about 1100 mL to 1500 mL.

∴FRC = ERV + RV

≅ 1500 + 1500

≅ 3000 mL

Functional residual capacity of the human lungs is about 2500 – 3000 mL.

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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Comments

Kim Taehyung
Nov 11, 2019

Currently, without knowing the answer, it's all good

Harsh
May 19, 2019

Bhai 1500 Ni hota hai Kam hota hai NCERT me dekh

Cody
Feb 15, 2019

Wow

ve
Dec 17, 2018

nice

Palak
Jun 04, 2017

Thank you so much saral study U made study so easy Thanks a lot again