During normal expiration, it is primarily ________.
Understand the Problem
The question is asking for the primary mechanism or process involved in normal expiration, which relates to respiratory physiology.
Answer
elastic recoil of the lungs and thorax
The final answer is elastic recoil of the lungs and thorax.
Answer for screen readers
The final answer is elastic recoil of the lungs and thorax.
More Information
During normal expiration, no additional energy is required because it relies on the natural elasticity of the lungs and thorax to return to their resting position.
Tips
A common mistake is confusing forced expiration with normal expiration, leading to incorrect assumptions about muscle contractions being involved.
Sources
- The Process of Breathing | Anatomy and Physiology II - courses.lumenlearning.com
- 22.3 The Process of Breathing - Anatomy and Physiology 2e - openstax.org
- Quiet (unforced) expiration is produced primarily by _____. - homework.study.com
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