Here, you will get Class 11 Biology MCQ of Chapter 17 Breathing And Exchange Of Gases for cracking NEET/AIIMS. By solving these MCQs of Class 11 Biology Chapter 17 Breathing And Exchange Of Gases, you will get the confidence to crack NEET. Practice MCQ Questions for Class 11 Biology with Answers on a daily basis and score well in exams.
Breathing And Exchange Of Gases Class 11 MCQs Questions with Answers
______ lies in front of esophagus
Answer: (a) Trachea
In brain, respiratory control centre lies in
(b) medulla oblongata
Answer: (b) medulla oblongata
Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically?
(a) unstraited muscle cells
(b) liver cells
(c) red blood cells
(d) white blood
Answer: (c) red blood cells
When CO2 concentration in blood increases, breathing becomes
(a) shallower and slow
(b) there is no effect on breathing
(c) slow and deep
(d) faster and deeper
Answer: (d) faster and deeper
Air is breathed through
(a) Trachea — lungs — larynx — pharynx — alveoli
(b) Nose — larynx — pharynx — bronchus — alveoli — bronchioles
(c) Nostrils — pharynx — larynx — trachea — bronchi — bronchioles — alveoli
(d) Nose — mouth — lungs
Answer: (c) Nostrils — pharynx — larynx — trachea — bronchi — bronchioles — alveoli
Wall of alveoli is composed of
(a) Simple squamous epithelium
(b) Simple cuboidal epithelium
(c) Pseudostratified epithelium
(d) Simple columnar epithelium
Answer: (a) Simple squamous epithelium
Intercostal muscles occur in
Answer: (c) ribs
People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude
(a) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
(b) there is more UV radiation which enhances RBC production
(c) people eat more nutritive food, therefore more RBCs are formed
(d) people get pollution – free air to breathe and more oxygen is available
Answer: (a) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
What percentage of CO2 flows in blood in form of bicarbonates
Answer: (d) 70%
Deoxygenated blood from heart comes to lungs via
(a) pulmonary vein
(b) systemic vein
(c) pulmonary artery
(d) systemic artery
Answer: (c) pulmonary artery
The alveolar epithelium in the lungs is
(a) nonciliated columnar
(b) nonciliated squamous
(c) ciliated columnar
(d) ciliated squamous
Answer: (b) nonciliated squamous
Thoracic cavity is enlarged by contraction of
(a) Internal Intercostal muscles
(d) All of above
Answer: (b) Diaphragm
Cartilaginous rings in trachea are incomplete at which surface?
Answer: (a) Dorsal
The two organisms which breath only through their moist skin are
(a) Frog and earthworm
(b) Fish and frog
(c) Leech and earthworm
(d) Fish and earthworm
Answer: (c) Leech and earthworm
Book lungs are respiratory organs of
Answer: (d) Arachnida
The oxygen dissociation curve is shifted to the right by an increase in
(a) H+ concentration
(d) All of these
Answer: (d) All of these
A man respires about
(a) 40 times per minute
(b) 72 times per minute
(c) 12-16 times per minute
(d) 100 times per minute
Answer: (c) 12-16 times per minute
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
Answer: (a) Mucus and cilia
RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by
(d) All RBCs and bicarbonate carried 70 per cent of carbondixide
Answer: (c) Bicarbonates
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
Answer: (d) All of these are correct
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.
Answer: (a) Every 100 mL of deoxygenated blood delivers approximately 4 mL of carbondioxide to the alveoli.
Trachea divides into bronchi at
(a) 4th thoracic vertebra
(b) 5th thoracic vertebra
(c) 6th thoracic vertebra
(d) 7th thoracic vertebra
Answer: (b) 5th thoracic vertebra
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.
Answer: (d) The visceral pleura is in direct contact with the chest wall.
Increased asthmatic attacks in certain seasons are related to
(a) Inhalation of seasonal pollen
(b) Hot and humid environment
(c) Low temperature
(d) Eating fruits preserved in containers
Answer: (a) Inhalation of seasonal pollen
A film of _____ lines lung alveoli that lowers _____ of the alveoli and makes breathing _____
(a) Lecithin, surface tension, easier
(b) Pleuron, surface tension, easier
(c) Cuticle, bacterial inflammation, difficult
(d) Cuticle, inflating, difficult
Answer: (a) Lecithin, surface tension, easier
Habit of Cigarette smoking can lead to
(a) loss of cilia lining the respiratory tract
(d) All of the Above
Answer: (d) All of the Above
Rheumatic fever can cause damage
(a) Alveoli of the Lungs
(b) heart valves
(c) heart muscles
(d) pleural membranes function
Answer: (b) heart valves
Aerobic respiratory pathway is also termed as ______ pathway.
(c) Creatine phosphate
Answer: (d) Amphibolic
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
Answer: (c) Total lung capacity
Pleura is a layer covering
Answer: (c) lungs
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