Which of the following does not contribute to defense of the respiratory system?
a. coughs and sneezes
b. cilia-propelled mucus escalator
c. alveolar macrophages
d. normal microbial population of the lungs
e. IgA antibodies
D
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Which cranial nerves are associated with the parasympathetic division of the ANS?
a: III b: IV c: V d: VII e: IX f: X g: XII A. a, d, e, f B. b, c, d, e C. a, c, d, g D. c, d, f, g E. b, e, f, g
Production of angiotensin II is important in the response to a(n) __________________ in the mean arterial blood pressure.
a) increase b) decrease
The body's ability to resist infections from pathogens is called ____________________.?
Fill in the blank(s) with correct word
The gastric enzyme ________ is secreted in inactive form and activated by the low pH of gastric juice.
A. rennin B. trypsin C. intrinsic factor D. pepsin