Respiratory Cycle / Quiet breath: Beginning of expiration
<<Prev <<Top>> Next>>

At the beginning of expiration...

The diaphragm relaxes (note that it has turned blue). There still are no changes in pressure, lung volume, etc.

Achievement Quiz
At the beginning of expiration, the diaphragm 1 [ A contracts / B relaxes ].
At the beginning of expiration, the lung volume is 2 [ A at its minimum / B increasing from its minimum to its maximum / C at its maximum / D decreasing from its maximum to its minimum ] (within a quiet breath).
At the beginning of expiration, the inward elastic force of the lungs is 3 [ A at its minimum / B increasing from its minimum to its maximum / C at its maximum / D decreasing from its maximum to its minimum ] (within a quiet breath).
At the beginning of expiration, 4 [ A gas (air) flows in / B there is no gas flow / C gas flows out ].
At the beginning of expiration, the pressure inside the lungs (alveolar pressure) is 5 [ A negative compared / B equal / C positive compared ] to the atmospheric pressure.
At the beginning of expiration, the negative pleural pressure is 6 [ A at its minimum / B increasing from its minimum to its maximum / C at its maximum / D decreasing from its maximum to its minimum ] (within a quiet breath).
Answer
1 [ B relaxes ]
2 [ C at its maximum ]
3 [ C at its maximum ]
4 [ B there is no gas flow ]
5 [ B equal ]
6 [ C at its maximum ]
<<Prev <<Top>> Next>>