Due to the negative intrapleural pressure, the pleural sac must remain airtight. If the pleural sac were broken, as in a piercing wound, which of the following would happen?
A. The lungs would collapse.
B. The lungs would expand outward.
C. The lungs would remain the same.
D. The lungs would burst.
Ans: A. The lungs would collapse.
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If someone runs a marathon through a desert while eating pretzels and not drinking water, their plasma osmolarity
A. rises and becomes hypertonic to the interstitial and intracellular fluid compartments. B. rises and becomes hypotonic to the interstitial and intracellular fluid compartments. C. decreases and becomes hypertonic to the interstitial and intracellular fluid compartments. D. decreases and becomes hypotonic to the interstitial and intracellular fluid compartments.
Compare and contrast inflammation and infection.
What will be an ideal response?
Mutation of the calmodulin gene would alter the ability of ________ to act as a second messenger.
A. sodium B. cAMP C. potassium D. calcium
Cell structures that are composed of macromolecules; fifth structure in the levels of organization in the body