Pulmonary surfactant:
1.decreases alveolar surface tension.
2.promotes alveolar collapse.
3.increases elastic recoil properties of the lungs.
4.is found in excess levels in infants born prematurely.
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The most important phagostimulants of insects are
A) Sugars. B) Amino acids. C) Fatty acids. D) Both A and B
Bradycardia and hypotension following an overaggressive dialysis treatment are MOST indicative of:
A) hypovolemia. B) hypokalemia. C) hyperkalemia. D) air embolism.
________ lacks the capacity to remember a pathogen or react differently to it in the future, whereas ________ utilizes memory cells to adapt to a given pathogen and ward it off more easily in the future
A) Adaptive immunity; specific immunity B) Nonspecific resistance; adaptive immunity C) Adaptive immunity; nonspecific resistance D) A natural killer cell; a cytoxic T cell E) Nonspecific resistance; cytotoxicity
The digestion of carbohydrates and lipids begins in the
A) oral cavity. B) esophagus. C) stomach. D) small intestine. E) large intestine.