In general, for a vessel of a given size, a typical artery ________ compared to a typical vein.
A) is more elastic
B) has less smooth muscle in its tunica media
C) has no endothelium
D) has thinner walls
E) has a larger lumen
A) is more elastic
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The pericardium lies within the ________, a portion of the thoracic cavity that lies between the left and right pleural cavities.
Fill in the blank(s) with the appropriate word(s).
________________________________________ stimulates the development of the mammary gland
Fill in the blank(s) with correct word
What might be the clinical significance of loss of surfactant production by type II alveolar cells?
A) Failure of type II alveolar cells to produce surfactant may result in alveolar collapse. B) Reduced amounts or absence of surfactant will result in more efficient alveolar inflation upon inspiration. C) Surfactant is not needed for proper lung function, so there would be no consequence if it were not produced. D) Because surfactant is produced by type I alveolar cells, there would be no clinical effect of reduced surfactant production by type II alveolar cells.
A neuron that is more negatively charged than it is at rest is ________.
A. polarized B. hyperpolarized C. depolarized D. refractory