The atrioventricular valves open during
a. atrial diastole.
b. both atrial and ventricular systole.
c. ventricular diastole.
d. atrial systole.
e. ventricular systole.
b. both atrial and ventricular systole.
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You go to the movies after a long day and you begin to nod off as soon as the movie starts. Your head starts to lower a little, but a reflex causes your head to rise. This is called the ________ reflex.
A. flexor (withdrawal) B. withdrawal C. tendon D. crossed extension E. stretch
If you are exposed to hepatitis A and have not been vaccinated against it, you may receive antibodies from another person. This is an example of ________.
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A child develops symptoms of chicken pox, produces antibodies against its specific antigens, and recovers from the illness. Later as an adult, he is immune to another exposure to the chicken pox virus. This is an example of which type of immunity?
A) artificially induced active immunity B) naturally acquired passive immunity C) artificially induced passive immunity D) innate (nonspecific) immunity E) naturally acquired active immunity
Which of the following substances undergo renal tubular secretion?
A. Ca2+ B. Na+ C. K+ D. H20