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Chapters
2: Biological Classification
3: Plant Kingdom
4: Animal Kingdom
5: Morphology of Flowering Plants
6: Anatomy of Flowering Plants
7: Structural Organisation in Animals
8: Cell : the Unit of Life
9: Biomolecules
10: Cell Cycle and Cell Division
11: Transport in Plants
12: Mineral Nutrition
13: Photosynthesis in Higher Plants
14: Respiration in Plants
15: Plant Growth and Development
16: Digestion and Absorption
▶ 17: Breathing and Exchange of Gases
18: Body Fluids and Circulation
19: Excretory Products and Their Elimination
20: Locomotion and Movement
21: Neural Control and Coordination
22: Chemical Coordination and Integration
![NCERT Exemplar solutions for Biology [English] Class 11 chapter 17 - Breathing and Exchange of Gases - Shaalaa.com](/images/biology-english-class-11_6:5f2b1b2038084cf381bfa42c826a928c.jpg "NCERT Exemplar solutions for Biology [English] Class 11 chapter 17 - Breathing and Exchange of Gases")
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Solutions for Chapter 17: Breathing and Exchange of Gases
Below listed, you can find solutions for Chapter 17 of CBSE NCERT Exemplar for Biology [English] Class 11.
NCERT Exemplar solutions for Biology [English] Class 11 17 Breathing and Exchange of Gases Exercises [Pages 96 - 100]
MULTIPLE CHOICE QUESTIONS
Respiration in insects is called direct because ______.
The tissues exchange `"O"_2/"CO"_2` directly with the air in the tubes.
The tissues exchange `"O"_2/"CO"_2` directly with coelomic fluid.
The tissues exchange `"O"_2/"CO"_2` directly with the air outside through the body surface.
Tracheal tubes exchange `"O"_2/"CO"_2` directly with the haemocoel which then exchanges with tissues.
Regarding the functions of our respiratory system, mark the wrong entry.
Humidifies the air
Warms up the air
Exchange of gases
Cleans up the air
A person suffers punctures in his chest cavity in an accident without any damage to the lungs. Its effect could be ______.
Reduced breathing rate
Rapid increase in breathing rate
No change in respiration
Cessation of breathing
It is known that exposure to carbon monoxide is harmful to animals because ______.
It reduces CO2 transport
It reduces O2 transport
It increases CO2 transport
It increases O2 transport
Mark the true statement among the following with reference to normal breathing.
Inspiration is a passive process where as expiration is active
Inspiration is a active process where as expiration is passive
Inspiration and expiration are active processes
Inspiration and expiration are passive processes
A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is ______.
Total lung capacity
Tidal volume
Vital capacity
Inspiratory capacity
Mark the incorrect statement in context to O2 binding to Hb
Higher pH
Lower temperature
Lower pCO2
Higher PO2
Which of the following statements is incorrect regarding respiratory system?
Each terminal bronchiole give rise to a network of bronchi.
The alveoli are highly vascularised.
The lungs are covered by a double-layered membrane.
The plecral fluid reduces friction on the lung surface.
Incidence of Emphysema – a respiratory disorder is high in cigarette smokers. In such cases ______.
The bronchioles are found damaged
The alveolar walls are found damaged
The plasma membrane is found damaged
The respiratory muscles are found damaged
Respiratory process is regulated by certain specialized centres in the brain. One of the following centres can reduce the inspiratory duration upon stimulation.
Medullary inspiratory centre
Pneumotaxic centre
Apneustic centre
Chemosensitive centre
CO2 dissociates from carbaminohaemoglobin when ______.
pCO2 is high and pO2 is low
pO2 is high and pCO2 is low
pCO2 and pO2 are equal
None of the above
In breathing movements, air volume can be estimated by ______.
Stethoscope
Hygrometer
Sphigmomanometer
Spirometer
From the following relationships between respiratory volume and capacities and mark the correct answer.
- Inspiratory capacity (IC) = Tidal Volume + Residual Volume
- Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV).
- Residual Volume (RV) = Vital Capacity (VC) – Inspiratory Reserve Volume (IRV)
- Tidal Volume (TV) = Inspiratory Capacity (IC) – Inspiratory Reserve Volume (IRV)
(i) Incorrect, (ii) Incorrect, (iii) Incorrect, (iv) Correct
(i) Incorrect, (ii) Correct, (iii) Incorrect, (iv) Correct
(i) Correct, (ii) Correct, (iii) Incorrect, (iv) Correct
(i) Correct, (ii) Incorrect, (iii) Correct, (iv) Incorrect
The oxygen-haemoglobin dissociation curve will show a right shift in case of ______.
High pCO2
High pO2
Low pCO2
Less H+ concentration
Match the following and mark the correct options
| Animal | Respiratory Organ |
| A. Earthworm | i. Moist cuticle |
| B. Insects | ii. Gills |
| C. Fishes | iii. Lungs |
| D. Birds/Reptiles | iv. Trachea |
A - ii, B - i, C - iv, D - iii
A - i, B - iv, C - ii, D - iii
A - i, B - iii, C - ii, D - iv
A - i, B - ii, C - iv, D - iii
VERY SHORT ANSWER TYPE QUESTIONS
Define the following terms?
Tidal volume
Define the following terms?
Residual volume
Define the following terms?
Asthma
A fluid filled double membranous layer surrounds the lungs. Name it and mention its important function.
Name the primary site of exchange of gases in our body?
Cigarette smoking causes emphysema. Give reason.
What is the amount of O2 supplied to tissues through every 100 ml. of oxygenated blood under normal physiological conditions?
A major percentage (97%) of O2 is transported by RBCs in the blood. How does the remaining percentage (3%) of O2 transported?
Arrange the following terms based on their volumes in an ascending order.
- Tidal Volume (TV)
- Residual Volume (RV)
- Inspiratory Reserve Volume (IRV)
- Expiratory Capacity (EC)
Complete the missing terms
Inspiratory Capacity (IC) = ______ + IRV
Complete the missing terms
______ = TV + ERV
Complete the missing terms
Functional Residual Capacity (FRC) = ERV + ______.
Name the organs of respiration in the following organisms:
Flatworm - ______.
Name the organs of respiration in the following organisms:
Birds - ______
Name the organs of respiration in the following organisms:
Frog - ______
Name the organs of respiration in the following organisms:
Cockroach - ______
Name the important parts involved in creating a pressure gradient between lungs and the atmosphere during normal respiration.
SHORT ANSWER TYPE QUESTIONS
State the different modes of CO2 transport in blood.
Compared to O2, diffusion rate of CO2 through the diffusion membrane per unit difference in partial pressure is much higher. Explain.
For completion of respiration process, write the given steps in sequential manner
- Diffusion of gases (O2 and CO2) across alveolar membrane.
- Transport of gases by blood.
- Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2.
- Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.
- Diffusion of O2 and CO2 between blood and tissues.
Differentiate between inspiratory and expiratory reserve volume
Distinguish between Vital capacity and Total lung capacity.
Differentiate between Emphysema and Occupational respiratory disorder
LONG ANSWER TYPE QUESTIONS
Explain the transport of O2 and CO2 between alveoli and tissue with diagram.
Explain the mechanism of breathing with neat labelled sketches.
Explain the role of neural system in regulation of respiration.
Solutions for 17: Breathing and Exchange of Gases
NCERT Exemplar solutions for Biology [English] Class 11 chapter 17 - Breathing and Exchange of Gases
Shaalaa.com has the CBSE Mathematics Biology [English] Class 11 CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT Exemplar solutions for Mathematics Biology [English] Class 11 CBSE 17 (Breathing and Exchange of Gases) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Biology [English] Class 11 chapter 17 Breathing and Exchange of Gases are Introduction of Breating and Exchange of Gases, Respiratory Organs, Human Respiratory System, Respiratory Volumes and Capacities, Exchange of Gases, Transport of Gases - Transport of Oxygen, Transport of Gases - Transport of Carbon Dioxide, Regulation of Breathing / Respiration, Disorders of Respiratory System, Breating and Exchange of Gases (Questions), Mechanism of Breathing.
Using NCERT Exemplar Biology [English] Class 11 solutions Breathing and Exchange of Gases exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Exemplar Solutions are essential questions that can be asked in the final exam. Maximum CBSE Biology [English] Class 11 students prefer NCERT Exemplar Textbook Solutions to score more in exams.
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