Breathing and Exchange of Gases MCQs | Breathing and Exchange of Gases Objective Type Questions and Answers

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Questions
1 During inspiration the diaphragm _______
A Expands
B Contracts
C No change
D Relaxes

Answer:Contracts
2 Respiration is a physical process and depends on the principle of diffusion.
A True
B False

Answer: False
3 Cramps during exercise are caused due to _______
A Chemiosmosis
B Glycolysis inhibition
C Lactic acid fermentation
D Alcohol fermentation

Answer: Lactic acid fermentation
4 A person can expel all the air from the lungs.
A True
B False

Answer:False
5 Which of the following is the product of the Krebs cycle?
A ATP
B NADH
C FADH
D All of the mentioned

Answer:All of the mentioned
6 Which of the following Produces maximum ATP?
A Krebs cycle
B Glycolysis
C Fermentation
D Oxidative Phosphorylation

Answer: Oxidative Phosphorylation
7 RQ is _____________
A Ratio of CO2 produced to substrate consumed
B Ratio of CO2 produced to O2 consumed
C Ratio of oxygen consumed to CO2 produced
D Ratio of oxygen consumed to water produced

Answer: Ratio of CO2 produced to O2 consumed
8 The epithelial tissues present on the inner surface of bronchioles and fallopian tubules are ________
A Squamous
B Ciliated
C Glandular
D Cuboidal

Answer:Ciliated
9 The site of respiration inside the lungs are _________
A Alveoli
B Diaphragm
C Bronchi
D Bronchioles

Answer: Alveoli
10 The number of gills present in Osteichthyes is _________
A 2 Pairs
B 5 pairs
C 10 pairs
D 12 pairs

Answer: 12 pairs
11 _________ acts as air conditioners.
A Nasal chambers
B Larynx
C Pharynx
D Lungs

Answer: Nasal chambers
12 Finest branches of bronchial intercom are bronchioles.
A True
B False

Answer: False
13 What is the function of trachea?
A Filters air we breathe
B Releases air out of the body
C Carries air to lungs
D Exchange of gas

Answer: Filters air we breathe
14 The trachea leads to the ________
A Pulmonary vessels
B Esophagus
C Bronchi
D Bronchioles

Answer: Bronchi
15 Hyaline cartilage has a primary function of ______________
A Protect thyroid
B Increase the surface area
C Support trachea
D Connect conchae

Answer: Support trachea
16 Which of the following does not belong to conducting portion of the respiratory system?
A Nose
B Pharynx
C Alveoli
D Bronchioles

Answer:Alveoli
17 The structure which closes of larynx is _________
A Epiglottis
B Vocal cords
C Adam’s apple
D Glottis

Answer: Epiglottis
18 Oxygen is carried by __________
A Platelets
B Leucocytes
C Erythrocytes
D Monocytes

Answer:Erythrocytes
19 In glycolysis during oxidation electrons are removed by __________
A NAD+
B ATP
C Molecular oxygen
D Glyceraldehyde-3-phoshate

Answer:NAD+
20 RQ of fat is ____________
A one
B more than one
C less than one
D infinity

Answer: less than one

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