Which of the following procedures results in the excretion of urine at the base rather than at the tip of the penis?
A. Subincision
B. Supercision
C. Excision
D. Infibulation
A. Subincision
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Which structure conducts electrical signals from the apex of the heart to the ventricular myocardium, causing the ventricles to contract?
a. arterioles b. sinoatrial node c. Purkinje fibers d. atrioventricular node
The oxygen production measured in the experiments of this exercise
a. is a consequence of the breakdown of hydrogen peroxide. b. is an index of enzyme activity. c. may depend on pH, temperature, or enzyme concentration. d. is all of the above.
Which of the following is a mismatched pair:
1. local infection - restricted to small area 2. viremia - viruses traveling in the blood 3. secondary infection - symptoms reoccur occasionally for years after an initial infection (ex. genital herpes) 4. acute infection: rapid onset of symptoms 5. focal infection: original location of spreading infection
In 1908, chemist Kikunae Ikeda identified a new taste modality he called "umami," or "delicious" in Japanese. It gives a savory flavor to meat, seaweed, and tomatoes. What molecule is responsible for umami?
A. Glutamate B. Fe+2 ions C. Na+ ions D. Mg+2 ions E. H+ ions