The laryngeal prominence (Adam's apple) in the neck is formed by this cartilage
A) epiglottis B) cricoid C) arytenoid D) thyroid
Answer: D
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The functional unit of the kidney is the
a) renal pelvis b) glomerulus c) renal corpuscle d) nephron
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.
Aldosterone causes cells in the distal tubules and collecting ducts to insert more water channels into their membranes to increase water permeability
Indicate whether the statement is true or false
Which of the following cell types is most numerous in the lung?
A. Ciliated columnar epithelial cells B. Goblet cells C. Squamous (type I) alveolar cells D. Great (type II) alveolar cells E. Alveolar macrophages (dust cells)