Question

During inspiration, the diaphragm
(a) expands
(b) shows no change
(c) contracts and flattens
(d) relaxes to become dome-shaped

Answer 1

Answer:

c) contracts and flattens

Explanation:

Answer 2

Diaphragm during inspiration:

• Option “C” is correct i.e. contracts and flattens.

• During inspiration, the diaphragm contracts and flattens.

• During inspiration, the diaphragm contracts and flattens to upsurge the volume of the thoracic cavity. This upsurge in volume leads to a decline in intra-alveolar pressure, which is a pressure lower than atmospheric pressure and generates the pressure gradient. Due to the gradient, the air is from the atmosphere is forced in the lungs through a nasal cavity.

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