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Respiratory System MCQ - Multiple Choice Question and Answer

Respiratory System MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 8
Emphysema is a respiratory disease in which

the larynx is closed
the trachea gets narrowed
the gas exchange area of lungs is increased
the gas exchange area of lungs is decreased

Question No : 9
The oxygen pressure in the alveolar air is

less than that is lung capillaries
equal to that in lung capillaries
double of that in lung capillaries
half of that in lung capillaries

Question No : 10
In all vertebrates, the oxygen transport is through

haemocyanin
haemoglobin
myoglobin
haemoerythrin

Question No : 11
The regulatory centre for respiration is situated in the

cerebral cortex
hypothalamus
medulla oblongata
procencephalon

Question No : 12
Colour of oxyhaemoglobin is

dull red
bluish red
bright red
dull brown

Question No : 13
The rate of respiration is lowest at

sleeping
running
eating food
playing

Question No : 14
The functional unit of the lung is

neuron
alveolus
bronchus
none of these