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

Breathing and Exchange of Gases Class 11 Biology MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases with Answers Pdf free download. MCQ Questions for Class 11 Biology with Answers were prepared based on the latest exam pattern. We have Provided Breathing and Exchange of Gases Class 11 Biology MCQs Questions with Answers to help students understand the concept very well.

Class 11 Biology Chapter 17 Quiz

Class 11 Biology Chapter 17 MCQ Online Test

You can refer to NCERT Solutions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Breathing and Exchange of Gases Class 11 Biology MCQ online test

Q1.	The function of pneumotaxic centre is
	A.regulate inspiration
	B.regulate rhythm
	C.increase heart rate
	D.all of the above

Ans: regulate inspiration
Explanation:
Pneumotaxic centre lies in pons in the brain. It regulates inspiration.

Q2.	Which one of the following is NOT correct?
	A.The nasal cavity warms and humidifies the air before it enters the lungs
	B.The right lung is composed of three lobes, but the left lung has only two lobes
	C.Lung volumes and vital capacity measure lung function.
	D.The visceral pleura is in direct contact with the chest wall.

Ans: The visceral pleura is in direct contact with the chest wall.

Q3.	______ lies in front of esophagus.
	A.Trachea
	B.Glottis
	C.Larynx
	D.Epiglottis

Ans: Trachea

Q4.	In brain, respiratory control centre lies in
	A.pons
	B.medulla oblongata
	C.hypothalamus
	D.cerebrum

Ans: medulla oblongata
Explanation:
Respiratory control centre or respiratory rhythm centre lies in medulla oblongata.
Pneumotaxic centre which lies in pons region of the brain can moderate the functions of the respiratory rhythm centre.

Q5.	Deoxygenated blood from heart comes to lungs via
	A.pulmonary vein
	B.systemic vein
	C.pulmonary artery
	D.systemic artery

Ans: pulmonary artery
Explanation:
MCQ Questions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases with Answers 1

Q6.	Label the parts of the human respiratory system.
	A.A- Oesophagus, B- Bronchioles, C- Lungs
	B.A- Trachea, B- Bronchioles, C- Lungs
	C.A- Trachea, B- Bronchus, C- Lungs
	D.A- Oesophagus, B- Bronchioles, C- Pleura

Ans: A- Trachea, B- Bronchus, C- Lungs
Explanation:
MCQ Questions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases with Answers 3

Q7.	Pleura is a layer covering
	A.heart
	B.kidneys
	C.lungs
	D.brain

Ans: lungs
Explanation:
Double layered membrane called pleura, which covers lungs in human body.

Q8.	Rheumatic fever can cause damage
	A.Alveoli of the Lungs
	B.heart valves
	C.heart muscles
	D.pleural membranes function

Ans: heart valves

Q9.	What protects the moist membranes of the respiratory tract?
	A.Mucus and cilia
	B.A c shaped cartilage rings
	C.A pebbly epidermal surface
	D.An acidic glands

Ans: Mucus and cilia

Q10.	RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by
	A.RBCs
	B.Plasma
	C.Bicarbonates
	D.All RBCs and bicarbonate carried 70 per cent of carbondixide.

Ans: Bicarbonates
Explanation:
20-25 per cent of carbondioxide is carried by RBCs.
70 per cent is carried as bicarbonate.
7 per cent is carried in a dissolved state through plasma.

Q11.	The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the ______.
	A.Total lung capacity
	B.Vital capacity
	C.Tidal volume
	D.Ventilation rate

Ans: Vital capacity

Q12.	Which one of the followings is correct regarding larynx?
	A.It prevents foreign objects from entering the trachea
	B.It houses the vocal cords
	C.It is an organ made of cartilage and connects the pharynx to the trachea
	D.All of these are correct

Ans: All of these are correct

Q13.	Which of the following statements is true about Trachea in a respiratory system?
	A.It functions as passages of air to each alveolus
	B.It functions for sound production
	C.It Acts as passage of air to bronchi
	D.It Lowers the surface tension

Ans: It Acts as passage of air to bronchi

Q14.	Which of the following statement is true?
	A.Every 100 mL of deoxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
	B.Every 100 mL of oxygenated blood delivers approximately 4 mL of oxygen to the tissues.
	C.Every 100 mL of oxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
	D.Every 100 mL of deoxygenated blood delivers approximately 10 mL of carbondioxide to the alveoli.

Ans: Every 100 mL of deoxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
Explanation:
Every 100 mL of deoxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
Every 100 mL of oxygenated blood delivers approximately 5 mL of oxygen to the tissues under normal physiological conditions.

Q15.	Trachea divides into bronchi at
	A.4th thoracic vertebra
	B.5th thoracic vertebra
	C.6th thoracic vertebra
	D.7th thoracic vertebra

Ans: 5th thoracic vertebra
Explanation:
Trachea is a straight tube extending up to the mid-thoracic cavity. It divides into bronchi at 5th thoracic vertebra.

Q16.	Aerobic respiratory pathway is also termed as ______ pathway.
	A.Anabolic
	B.Catabolic
	C.Creatine phosphate
	D.Amphibolic

Ans: Amphibolic

Q17.	The oxygen dissociation curve is shifted to the right by an increase in ______.
	A.H+ concentration
	B.PCO₂
	C.temperature
	D.All of these

Ans: All of these

Q18.	The maximum volume of air contained in the lung by a full forced inhalation is called
	A.Vital capacity
	B.Tidal volume
	C.Total lung capacity
	D.Inspiratory capacity

Ans: Total lung capacity

Q19.	Which one of the following is NOT correct?
	A.The nasal cavity warms and humidifies the air before it enters the lungs
	B.The right lung is composed of three lobes, but the left lung has only two lobes.
	C.Lung volumes and vital capacity measure lung function.
	D.The visceral pleura is in direct contact with the chest wall.