#Question id: 11058
#Unit 10. Ecological Principles
The pufferfish, a common marine fish, has extensive spines that extend outward when it swallows water, becoming several times its normal size. This is an example of what kind of defense against predation?
#Question id: 11059
#Unit 7. System Physiology – Animal
A healthy, 45-year-old man is reading the newspaper. Which of the following muscles are used for quiet breathing?
#Question id: 11060
#Unit 7. System Physiology – Animal
A healthy, 25-year-old medical student participates in a 10-km charity run for the American Heart Association. Which of the following muscles does the student use (contract) during expiration?
#Question id: 11061
#Unit 7. System Physiology – Animal
The pleural pressure of a normal 56-year-old woman is approximately −5 cm H2O during resting conditions immediately before inspiration (i.e., at functional residual capacity). What is the pleural pressure (in cm H2O) during inspiration?
#Question id: 11062
#Unit 7. System Physiology – Animal
The alveolar pressure of a normal 77-year-old woman is approximately 1 cm H2O during expiration. What is the alveolar pressure during inspiration (in cm H2O)?
#Question id: 11063
#Unit 7. System Physiology – Animal
A man inspires 1000 ml from a spirometer. The intrapleural pressure was −4 cm H2O before inspiration and −12 cm H2O the end of inspiration. What is the compliance of the lungs?