Please help me with these questions. Thank you in advance. 1. When air pressure within the...
Please help me with these questions. Thank you in advance.
1. When air pressure within the lungs is lower than that of the atmosphere, air will _______________ the lungs.
2. During quiet tidal breathing, is expiration active or passive?
3. Describe the activation and movement of the diaphragm during a
respiratory cycle (one inspiration and one expiration).
Homework Answers
1.
Moves into the lungs.
- Air moves from higher pressure to lower pressure.
2.
Passive.
- Expiration is a passive process.
3.
Inspiration.
1) Diaphragm contracts
2) Lungs are pulled down
3) Lungs expand
4) Air is drawn into the lungs.
Expiration.
1) Diaphragm relaxes
2) Thorax is pulled down
3) Diaphragm is forced high into the thorax
4) Air is forced out of the lungs.
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