The ________ are the superior chambers of the heart and the ________ are the inferior chambers of the heart.
A. visceral percardia; parietal pericardia
B. left atria; right atria
C. left ventricles; right ventricles
D. atria; ventricles
E. ventricles; atria
Answer: D
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Leukopenia is a disorder resulting from conditions like HIV and aplastic anemia that causes levels of white blood cells to drop below the normal standard. Which of the following white blood cell counts suggests leukopenia?
A. 3,000 WBCs per microliter of blood B. 10,000 WBCs per microliter of blood C. 5,000 WBCs per microliter of blood D. 3,900 WBCs per microliter of blood
A hormone that can lower blood levels of calcium ion is
A) parathyroid hormone. B) thyroxine. C) calcitonin. D) glucagon. E) oxytocin.
A molecule that carries energy in a form the cell can use is
A) ATP. B) glucose. C) glycogen. D) vitamin C.
Sympathetic stimulation of the postganglionic cells of the adrenal medulla causes the release of
A. acetylcholine and epinephrine. B. norepinephrine and acetylcholine. C. epinephrine and norepinephrine. D. cortisol. E. aldosterone.