Complete each sentence with the correct word. According to Boyle\'s law, as volu

Question

Complete each sentence with the correct word. According to Boyle's law, as volume decreases, pressure decreases , and as volume increases pressure inspiration Air always moves from an area of high pressure to an area of pressure. low During the atmospheric pressure. the pressure in the alveoli is less than greater During the alveolar pressure , the atmospheric pressure is less than high expiration When the diaphragm muscle contracts, the pressure in the alveoli increases As the intercostal muscles relax and the thoracic cavity becomes smaller, the pressure in the alveoli

Explanation / Answer

According to Boyle's law, as volume decreases pressure increases and as volume increases pressure decreases.

P1V1 = P2V2 Boyle's law relation

Air always moves from an area of high pressure to an area of low pressure.

During inspiration, the pressure in the alveoli is less than that of atmospheric pressure.

That is the reason why air moves from atmosphere to the lungs ( air moves from a region of high pressure to a region of low pressure)

During expiration, the atmospheric pressure is less than that of alveoli

That is the reason why air moves from lungs to the atmosphere ( air moves from a region of high pressure to a region of low pressure)

When the diaphragm contracts, the pressure in the alveoli increases

(this is because, the air actually entersfrom the atmosphere to the lungs)

When the intercoastal muscles relax and the area of the thoracic cavity becomes smaller, the pressure in the alveoli decreases.

(this is because air moves out of the lungs into the atmosphere causing the pressure to decrease).

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