Using the equation PV = constant; if the volume of the thoracic cavity increases (in other words, the size of the thoracic cavity increases), the pressure inside the thoracic cavity will __________.
- increase
- decrease
- stay the same
Please select an option
When the pressure within the thoracic cavity increases compared to atmospheric pressure, air will __________ the lungs.
- exit
- enter
- not enter or exit
Please select an option
Using the equation PV = constant; if the volume of the thoracic cavity decreases (in other words, the size of the thoracic cavity decreases), the pressure inside the thoracic cavity will __________.
- increase
- decrease
- stay the same
Please select an option
When the pressure within the thoracic cavity decreases (compared to atmospheric pressure) air will __________ the lungs.
- exit
- enter
- not enter or exit
Please select an option
In order to inhale, the size of the thoracic cavity has to increase in order to decrease the internal pressure (compared to atmospheric pressure). In order to accomplish this task, which of the following must occur?
- the diaphragm muscle and external intercostals contract
- the diaphragm muscle and external intercostals relax
- the diaphragm muscle contracts and the external intercostals relax
Please select an option