Final answer:
The amount of air that is inhaled or exhaled during quiet breathing at rest is called tidal volume, which is a key part of the respiratory system and the respiratory cycle.
Step-by-step explanation:
The amount of air that is inhaled or exhaled during quiet breathing is referred to as the tidal volume. This is the volume of air that enters or leaves the lungs during a normal breath taken at rest. The tidal volume is an important aspect of the respiratory system, which plays a crucial role in gas exchange, getting oxygen into the bloodstream and removing carbon dioxide from it.
When not exerting themselves, humans usually breathe around 15 times per minute, and during each of these breaths, a specific volume of air is inhaled or exhaled in a cycle known as the respiratory cycle. Quiet breathing, also known as eupnea, does not require conscious effort and involves the use of the diaphragm and external intercostals muscles for the inhalation and exhalation processes.