12 Questions
What effect does surfactant have on pulmonary compliance?
Increases it
Why do the curves for inspiration and expiration differ when plotting change in volume over change in pressure?
Related to hysteresis caused by surface tension
Which nerve innervates the diaphragm?
Phrenic nerve
What term is used to describe the volume of air left in the lung at the end of normal quiet expiration?
Functional residual capacity
What is the function of pulmonary surfactant?
Reduces surface tension of alveoli
Which factor primarily determines the functional residual capacity of the lungs?
Elastic re-coil of the lungs
Which muscles are involved in active inspiration?
Diaphragm
What is the total volume of air from maximum inspiration to maximal expiration called?
Vital capacity
What does the parietal pleura membrane cover?
Internal surface of thoracic cavity
What is a measure of hysteresis when plotting change in volume over change in pressure?
Size of the shape captured within two curves
What is the function of the visceral pleura membrane?
Covers lobes of lungs
What is the role of the atmospheric pressure in breathing?
Affects the pressure of surrounding air
Learn about the anatomy and function of the respiratory system, including the number of lobes in each lung, the membranes covering the lungs, and the role of the pleural cavity. Explore the control of breathing, both involuntary and voluntary, and the mechanisms involved in active expiration.
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