12 Questions
What is the relationship between pressure and volume according to Boyle's Law?
Inversely proportional
What happens to the pressure in the thoracic cavity during expiration?
It increases
What is the primary force involved in exhalation during quiet breathing?
Passive elastic recoil
What is the purpose of the diaphragm and external intercostal muscles contracting during quiet inhalation?
To create a negative pressure, allowing air to flow into the lungs
Why does air rush out of the lungs during expiration?
To equalize pressure
What is required for speech and singing?
Constant subglottal pressure
What is the primary mechanism of exhalation during speech production?
Combination of passive and active expiratory forces
What is the ideal lung volume for speech breathing, according to the relaxation pressure curve?
Medium lung volume (20-70% of vital capacity)
What is the minimum subglottal pressure required to set vocal folds into vibration?
7cm water pressure
What happens to subglottal pressure at high levels of vital capacity?
Subglottal pressure increases
What is the significance of the 37% vital capacity cutoff on the relaxation pressure curve?
It marks the transition from active to passive forces
What is the term for the total amount of air that can be exhaled from the lungs after maximum inhalation?
Vital capacity
Learn about Boyle's Law and its relation to respiration, including the changes in pressure and volume during expiration. This quiz also covers the differences between speech breathing and quiet breathing, and the active and passive forces involved.
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