OnlineCBT
Biology · PYQ NEET UG 2020
हिन्दीSelect the correct events that occur during inspiration.\n(a) Contraction of diaphragm\n(b) Contraction of external inter-costal muscles\n(c) Pulmonary volumes decreases\n(d) Intra pulmonary pressure increases
Correct answer · Option 4
(a) and (b)
Explanation
During inspiration, the contraction of diaphragm and external intercostal muscles increases thoracic volume and decreases intra-pulmonary pressure, allowing air to enter.
