Arrange the following events of the male sexual act in the correct sequence:(1) Ejaculation(2) Emission(3) Erection
A. 2, 3, 1
B. 3, 1, 2
C. 1, 2, 3
D. 3, 2, 1
E. 1, 3, 2
Answer: D
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A. atrioventricular node. B. Purkinje fibers. C. sinoatrial node. D. AV bundle.
The ________ nervous system signals blood vessels to constrict.
A. parasympathetic B. central C. sympathetic D. peripheral
Which of the following is not a function of the respiratory system?
A. It allows exchange of oxygen and carbon dioxide between blood and air. B. It contributes to maintenance of pH balance. C. It helps to expel abdominal contents during defecation and childbirth. D. It helps to transport gases to tissues. E. It permits vocalizations.
The epithelium that lines the body cavities is known as
A) endothelium. B) mesothelium. C) perithelium. D) metothelium. E) ectothelium.