Breathing and Exchange of Gases MCQ Questions for Class 11 Biology Chapter 17 with Answers

Find here the NCERT chapter-wise Multiple Choice Questions from Class 11 Biology Book Chapter 17 Breathing and Exchange of Gases with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Breathing and Exchange of Gases. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

NCERT Chapters for Class 11 Biology

Q1. In man, gas exchange between the environment and the body takes place in

(i) Bronchi
(ii) Larynx
(iii) Alveoli
(iv) Trachea

(iii) Alveoli

Q2. Deoxygenated blood from heart comes to lungs via

(i) pulmonary vein
(ii) systemic vein
(iii) pulmonary artery
(iv) systemic artery

(iii) pulmonary artery

Q3. The lungs are enclosed in a covering called

(i) Perichondrium
(ii) Pleural membrane
(iii) Pericardium
(iv) Peritoneum

(ii) Pleural membrane

Q4. Very high number of alveoli present in a lung is meant for

(i) More space for increasing volume of inspired air
(ii) More area for diffusion
(iii) Making the organ spongy
(iv) Increasing nerve supply

(ii) More area for diffusion

Q5. A man respires about

(i) 40 times per minute
(ii) 72 times per minute
(iii) 12-16 times per minute
(iv) 100 times per minute

(iii) 12-16 times per minute

Q6. In brain, respiratory control centre lies in

(i) pons
(ii) medulla oblongata
(iii) hypothalamus
(iv) cerebrum

(ii) medulla oblongata

Q7. Wall of alveoli is composed of

(i) Simple squamous epithelium
(ii) Simple cuboidal epithelium
(iii) Pseudostratified epithelium
(iv) Simple columnar epithelium

(i) Simple squamous epithelium

Q8. Intercostal muscles occur in:

(i) abdomen
(ii) thigh
(iii) ribs
(iv) diaphragm

(iii) ribs

Q9. Which of the following is not a step in the process of respiration?

(i) Breathing
(ii) Diffusion of oxygen from blood to tissues
(iii) Production of energy
(iv) Diffusion of oxygen from tissues to blood

(i) Breathing

Q10. Which one of the following is NOT correct?

(i) The nasal cavity warms and humidifies the air before it enters the lungs
(ii) The right lung is composed of three lobes, but the left lung has only two lobes
(iii) Lung volumes and vital capacity measure lung function.
(iv) The visceral pleura is in direct contact with the chest wall.

(iv) The visceral pleura is in direct contact with the chest wall.

Q11. The exchange of gases in the alveoli of the lungs takes place by:

(i) simple diffusion
(ii) osmosis
(iii) active transport
(iv) passive transport

(i) simple diffusion

Q12. The process of migration of chloride ions from plasma to RBC and of carbonate ions from RBC to plasma is:

(i) chloride shift
(ii) ionic shift
(iii) atomic shift
(iv) Na+ pump

(i) chloride shift

Q13. Which one of the following does not contribute to the breathing movement in mammals?

(i) Abdominal muscles
(ii) Larynx
(iii) Ribs
(iv) Diaphragm

(iii) Ribs

Q14. Pleura is a layer covering

(i) heart
(ii) kidneys
(iii) lungs
(iv) brain

(iii) lungs

Q15. Oxygen dissociation curve of haemoglobin is:

(i) Sigmoid
(ii) Hyperbolic
(iii) Linear
(iv) Hypobolic

(i) Sigmoid

Q16. Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically?

(i) unstraited muscle cells
(ii) liver cells
(iii) red blood cells
(iv) white blood

(iii) red blood cells

Q17. The largest quantity of air that can be expired after a maximal inspiratory effort is

(i) Tidal volume
(ii) Vital capacity of lungs
(iii) Lung volume
(iv) Residual volume

(iii) Lung volume

Q18. Rheumatic fever can cause damage

(i) Alveoli of the Lungs
(ii) heart valves
(iii) heart muscles
(iv) pleural membranes function

(ii) heart valves

Q19. Cartilaginous rings in trachea are incomplete at which surface.

(i) Dorsal
(ii) Ventral
(iii) Lateral
(iv) Ventrolateral

(i) Dorsal

Q20. Azygous lobe is part of

(i) Lung
(ii) Kidney
(iii) Larynx
(iv) Palate

(i) Lung

Q21. If a man from sea coast of Mumbai goes to Mount Everest:

(i) His breathing rate and heart beat will increase
(ii) His breathing rate and heart beat will decrease
(iii) His breathing rate will increase, but heart beat will decrease
(iv) His breathing rate will decrease, but heart beat will increase.

(i) His breathing rate and heart beat will increase

Q22. What protects the moist membranes of the respiratory tract?

(i) Mucus and cilia
(ii) A c shaped cartilage rings
(iii) A pebbly epidermal surface
(iv) An acidic glands

(i) Mucus and cilia

Q23. Thoracic cavity is enlarged by contraction of

(i) Internal Intercostal muscles
(ii) Diaphragm
(iii) Lungs
(iv) All of above

(iv) All of above

Q24. The alveolar epithelium in the lungs is:

(i) nonciliated columnar
(ii) nonciliated squamous
(iii) ciliated columnar
(iv) ciliated squamous

(ii) nonciliated squamous

Q25. Lungs are covered by

(i) Perichondrium
(ii) Pleura
(iii) Periosteum
(iv) Pericardium

(iv) Pericardium

Q26. Which one of the followings is correct regarding larynx?

(i) It prevents foreign objects from entering the trachea
(ii) It houses the vocal cords
(iii) It is an organ made of cartilage and connects the pharynx to the trachea
(iv) All of these are correct

(iv) All of these are correct

Q27. Book lungs are respiratory organs of

(i) Mammals
(ii) Mollusca
(iii) Earthworm
(iv) Arachnida

(iv) Arachnida

Q28. How much oxygen, blood supplies to tissues in one circulation

(i) 75%
(ii) 1.34%
(iii) 25%
(iv) 7%

(iii) 25%

Q29. Lung lobes of human being are

(i) 2 left and 3 right
(ii) 3 in each
(iii) 2 in each
(iv) 3 left and 2 right

(i) 2 left and 3 right

Q30. Trachea divides into bronchi at

(i) 4th thoracic vertebra
(ii) 5th thoracic vertebra
(iii) 6th thoracic vertebra
(iv) 7th thoracic vertebra

(ii) 5th thoracic vertebra

Q31. If TLC is 5500ml, IRV is 2950ml, ERV is 900ml and TV is 500ml then what will be value of RV?

(i) 2550ml
(ii) 1100ml
(iii) 1200ml
(iv) 1150ml

(iv) 1150ml

Q32. The carbon dioxide is transported via blood to lungs as:

(i) dissolved in blood plasma
(ii) in the form of carbonic acid only
(iii) in combination with haemoglobin only
(iv) carbaminohaemoglobin and as carbonic acid

(iv) carbaminohaemoglobin and as carbonic acid

Q33. Body cavity is divided into thoracic

(i) Heart
(ii) Liver
(iii) Lungs
(iv) Diaphragm

(iv) Diaphragm

Q34. The maximum volume of air contained in the lung by a full forced inhalation is called

(i) Vital capacity
(ii) Tidal volume
(iii) Total lung capacity
(iv) Inspiratory capacity

(iii) Total lung capacity

Q35. During inspiration muscles of diaphragm

(i) Contracts
(ii) Expands
(iii) No effect
(iv) Coiled like string

(ii) Expands

Q36. The two organisms which breath only through their moist skin are

(i) Frog and earthworm
(ii) Fish and frog
(iii) Leech and earthworm
(iv) Fish and earthworm

(iii) Leech and earthworm

Q37. Excess of water absorbed by human being is passed out in urine. Other sources is

(i) Inspiration
(ii) Expiration
(iii) Defaecation
(iv) Salivation

(ii) Expiration

Q38. Which organ lies in thoracic cavity?

(i) Heart
(ii) Lungs
(iii) Pancreas
(iv) Both 1and 2

(iv) Both 1 and 2

Q39. The pneumotaxic centre is present in

(i) Medulla
(ii) Cerebrum
(iii) Cerebellum
(iv) Pons varolii

(iv) Pons varolii

(i) Inhalation of seasonal pollen
(ii) Hot and humid environment
(iii) Low temperature
(iv) Eating fruits preserved in containers

(i) Inhalation of seasonal pollen

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