Rupture of the papillary muscles in the left ventricle may result in any of the following except
A) mitral regurgitation.
B) mitral valve prolapse.
C) bicuspid regurgitation.
D) bicuspid prolapse.
E) pulmonary valve stenosis.
Answer: E
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Because a neuron loses its centrioles,
A) it loses its normal ability to produce a myelin sheath. B) it is probably located in the PNS. C) it is rendered incapable of dividing. D) it cannot grow as quickly as neurons that retain their centrioles. E) All of the answers are correct.
Which term refers to a normal respiratory rate?
a. dyspnea b. apnea c. eupnea d. hyperventilation
Valvular malfunction in the heart __________.
a. interferes with ventricular contraction b. causes an increase in the amount of blood pumped out of each ventricle c. interferes with movement of blood through the heart d. increases the cardiac output
The amount of blood remaining in each ventricle at the end of the ventricular ejection phase is normally about:
A) 50 ml. B) 120 ml. C) 70 ml. D) 30 ml.