Students should refer to Worksheets Class 11 Biology Breathing and Exchange of Gases Chapter 17 provided below with important questions and answers. These important questions with solutions for Chapter 17 Breathing and Exchange of Gases have been prepared by expert teachers for Class 11 Biology based on the expected pattern of questions in the Class 11 exams. We have provided Worksheets for Class 11 Biology for all chapters on our website. You should carefully learn all the important examinations questions provided below as they will help you to get better marks in your class tests and exams.
Breathing and Exchange of Gases Class 11 Biology Worksheet
Question. Which of the following muscles help to increase the volume of thoracic cavity ?
(a) Diaphragm and EICM
(b) EICM and IICM
(c) Diaphragm and Abdominal muscles
(d) IICM and abdominal muscles
Answer
A
Question. The partial pressure of oxygen in alveolar air and oxygenated blood respectively :
(a) 40 mm Hg, 45 mm Hg
(b) 104 mm Hg, 95 mm Hg
(c) 159 mm Hg, 104 mm Hg
(d) 104 mm Hg, 40 mm Hg
Answer
B
Question. Which of the following is a common passage for food and air ?
(a) External nostrils
(b) Oesophagus
(c) Trachea
(d) Pharynx
Answer
D
Question. A – Diaphragm
B – EICM
C – IICM
D – Abdominal muscles
We have the ability to increase the strength of expiration by the contraction of which set of muscles?
(a) A, B, C and D
(b) A, C and D
(c) C and D
(d) A and D
Answer
C
Question. Match the column-A with column-B
| Column-A | Column-B |
| i IRV | a 1200 ml |
| ii ERV | b 1000 m |
| iii TV | c 2500 ml |
| a 1200 ml | d 500 ml |
(a) i – c, ii – b, iii – d, iv – a
(b) i – a, ii – c, iii – d, iv – b
(c) i – b, ii – c, iii – a, iv – d
(d) i – d, ii – b, iii – d, iv – a
Answer
A
Question. Trachea is a straight tube extending up to the….
(a) end of thoracic cavity
(b) anterior of thoracic cavity
(c) end of the neck
(d) middle of the neck
Answer
B
Question. Which of the following statement are/is true ?
(a) Alveolar wall is one celled thick.
(b) The total thickness of diffusion membrane is much less than a millimeter.
(c) At the level of alveoli gaseous exchange occurs by simple diffusion.
(d) All of these
Answer
D
