What function do transitional epithelia have?
A. absorption
B. filtration
C. resistance to friction
D. stretching
Ans: D. stretching
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Physiologic dead space increases with:
A) tachypnea. B) deep breathing. C) alveolar inflation. D) pulmonary obstructions.
In which situation would an injected drug be the most effective agonist for an endogenous chemical messenger?
A. The drug has a lower affinity for the messenger's receptors than the messenger does. B. The drug achieves 50% saturation of the messenger's receptors at a lower concentration than that required by the messenger. C. The drug binds to an alternate binding site on the protein receptor and reduces its affinity for the endogenous chemical messenger. D. The drug does not couple to the binding site of the messenger's receptor.
Which of the following bones makes up most of the medial wall of the orbit?
A) maxilla B) ethmoid bone C) frontal bone D) zygomatic bone E) sphenoid bone
Gastric chief cells secrete pepsin
Indicate whether the statement is true or false.