During inspiration, the diaphragm __________, causing a(n) __________ in thoracic volume and a(n) __________ in alveolar pressure.Multiple Choicerelaxes; decrease; increasecontracts; decrease; increasecontracts; increase; decreaserelaxes; increase; decrease
Question
During inspiration, the diaphragm __________, causing a(n) __________ in thoracic volume and a(n) __________ in alveolar pressure.Multiple Choicerelaxes; decrease; increasecontracts; decrease; increasecontracts; increase; decreaserelaxes; increase; decrease
Solution
The correct answer is "contracts; increase; decrease".
During inspiration (or inhalation), the diaphragm contracts, which means it moves downward. This movement increases the volume of the thoracic cavity (the area that houses the lungs). As the volume of the thoracic cavity increases, the pressure within it decreases. This decrease in pressure allows air to flow into the lungs, as air moves from areas of high pressure to areas of low pressure.
Similar Questions
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