Chapter 13 (Gaseous Exchange) F.Sc 1st Year Biology Short Questions

Level: F.Sc (Pre-Engg)
Class: 1st Year
Board: Punjab Textbook Board
Subject: Biology
Chapter 13: Gaseous Exchange
Type: Short Questions
Author: Kiran Mehtab
Pages: 6
PDF Size: 2 MB

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In human being what is the total inside capacity of lungs when fully inflated?

In an adult human being when the lungs are fully inflated the total inside capacity of lung is about 5 litres.

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What is the residual volume of lungs?

There is a residual volume of 1.5 litres even during exercise which can be expelled.

What are two properties of a respiratory surface? or Write four properties of respiratory surface.

  • The respiratory surface should be wet
  • It should be thin
  • It should be well ventilated
  • It should have large number of blood capillaries in which blood flows

How does gaseous exchange occur in frog?

In frog, the gaseous exchange occurs through the lungs but these structures are not very efficient. Therefore, the lungs are supplemented by skin and buccal chamber which are richly supplied with blood vessels. These blood carrying sites are exposed to water carrying oxygen for the exchange of gases.

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