Each molecule of hemoglobin has the capacity to carry __________ molecules of oxygen (O2).
a. 2
b. 4
c. 6
d. 8
Ans: b. 4
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Untreated diabetes mellitus results in all of the following except
a. increased urinary excretion of glucose b. metabolic acidosis c. dehydration d. decreased levels of fatty acids in the blood e. increased levels of amino acids in the blood
at least one-half of one parathyroid gland is necessary to maintain normal parathormone levels
a. true b. false
Which region of the kidney contains the renal pyramids?
A) renal cortex B) renal medulla C) renal pelvis D) renal sinus
Reflux of gastric contents into the esophagus occurs because of
A. relaxation of the cardiac sphincter. B. contraction of the pyloric sphincter. C. spasms of the submucosal layer of the stomach wall. D. increased hydrochloric acid production by the parietal cells. E. increased amounts of mucous produced by the stomach.