NEET2020Zoology-Respiratory System
NEET 2020 Zoology Mechanism of Breathing Multiple Correct Question
Type: Multiple Correct-conceptual-Medium-Class 11
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
A
(a), (b) and (d)
B
only (d)
C
(a) and (b)
D
(c) and (d)
Correct Answer
Option C
Detailed Explanation
During inspiration, the diaphragm contracts and the external inter-costal muscles contract, increasing pulmonary volume and decreasing pressure.
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