8
MCQ (Single Correct Answer)
Mark the correct pair of muscles involved in the normal breathing in humans.
A
External and internal intercostal muscles
B
Diaphragm and abdominal muscles
C
Diaphragm and external intercostal muscles
D
Diaphragm and intercostal muscles
9
MCQ (Single Correct Answer)
Incidence of emphysema a respiratory disorder is high in cigarette smokers. In such cases
A
the bronchioles are found damaged
B
the alveolar walls are found damaged
C
the plasma membrane is found damaged
D
the respiratory muscles are found damaged
10
MCQ (Single Correct Answer)
Respiratory process is regulated by certain specialised centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation.
A
Medullary inspiratory centre
B
Pneumotaxic centre
C
Apneustic centre
D
Chemosensitive centre
11
MCQ (Single Correct Answer)
$\mathrm{CO}_2$ dissociates from carbamino haemoglobin when
A
$p \mathrm{CO}_2$ is high and $p \mathrm{O}_2$ is low
B
$p \mathrm{O}_2$ is high and $p \mathrm{CO}_2$ is low
C
$p \mathrm{CO}_2$ and $p \mathrm{O}_2$ are equal
D
None of the above
12
MCQ (Single Correct Answer)
In breathing movements, air volume can be estimated by
A
stethoscope
B
hygrometer
C
sphygmomanometer
D
spirometer