What are the phagocytic specialists called that are within the air sacs (alveoli) of the lungs?
a. alveolar macrophages
b. lung neutrophils
c. respiratory phagocytes
d. pulmonary scavengers
e. air sac scavengers
a
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Which of the following is a not a true statement regarding the countercurrent multiplication system?
A) The thin limb of the nephron loop is permeable to water. B) The thick limb of the nephron loop is permeable to solutes. C) Osmotic concentration in the nephron loop decreases as fluid flows toward the bottom of the loop. D) Tubule fluid arrives at the DCT at about 100 mOsm/L. E) The maximum solute concentration is about 1200 mOsm/L.
Before a doctor performs an episiotomy, a cut in the perineum that makes the opening of the birth canal larger, branches of what nerves arising from the lumbosacral plexuses are anesthetized?
A) femoral nerves B) ischiadic nerves C) obturator nerves D) pudendal nerves
In a complete AV node block, ________.
A. the ventricles contract due to the Purkinje fiber pacemaker B. no signals pass into the ventricles C. the atria will be paced by the SA node D. All of the choices are correct.
Which of the following diseases has a known genetic predisposition?
a. Asthma b. Chronic obstructive pulmonary disease c. Congestive heart failure d. Meningitis