S1, the first heart sound, represents:
A) closure of the mitral and tricuspid valves.
B) the sound heard at the end of diastole.
C) closure of the aortic and pulmonic valves.
D) the sound heard at the end of systole.
Answer: A) closure of the mitral and tricuspid valves.
Health Professions
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The life span of a normal erythrocyte is about:
a. 9-11 days b. 5-7 days c. 120 days d. 6 hours
Health Professions
A medication is found during clinical testing to potentially deform, injure, or kill an unborn fetus. The medication would be categorized by the FDA as:
A) teratogenic. B) analgesic. C) iatrogenic. D) anticholinergic.
Health Professions