3.el 64% 3:58 PM QUESTI0 0.5 points Save Answer During expiration the air pressu

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3.el 64% 3:58 PM QUESTI0 0.5 points Save Answer During expiration the air pressure in the pharynx is the air pressure in the primary bronchi. less than greater than equal to QUESTIO 0.5 points Save Answer During the pause at the end of inspiration, the air pressure in the alveali is less than O greater than equal to QUESTION 6 0.5 points Intrapleurall pressure is the pressure in the alveoli (intrapulmonary pressure). O usually greater than always less than always equal to O never less than Save All Answers Save and Submit

Explanation / Answer

1. Air moves from higher to lower pressure. For the air to move from bronchi towards the pharynx, the air pressure in pharynx has to be less than that in primary bronchi during expiration.

2. When the air pressure is less or more, the air moves one way or the another. So, at the end of inspiration during the pause, the air pressure in the alveoli is equal to atmospheric pressure.

3. Intrapleural pressure is the pressure within the pleural cavity. The pressure within the pleural cavity is always slightly less than the atmospheric pressure. the relation between intra-pulmonary pressure and the intra-pleural pressure is that the pressure becomes more negative during inspiration and allows air to get sucked in and during expiration the pressure becomes less negative.

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