The first antimicrobial agents that were discovered were the:
A) penicillins
B) sulfonamides
C) macrolides
D) cephalosporins
B) sulfonamides
B) The first antimicrobial agents discovered were the sulfonamides. They were first synthesized in 1908, but it was many years before their therapeutic value was discovered. In 1937, researchers in England synthesized sulfapyridine, which was the first sulfonamide used with great success in combatting pneumonia.
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The ability to distinguish colors depends on the cones of the retina, which react to light and permit us to see shades of red, green, and ________
a. yellow b. black c. blue d. white
In the frontal lobe, upper motor neurons that control voluntary movement are located mainly on the:
a. Primary motor cortex b. Prefrontal cortex c. Premotor cortex d. Supplementary motor cortex
When water is converted to steam, it expands approximately ___ times and can cool a much larger area
A. 1,200 B. 1,500 C. 1,700 D. 2,000
A ____ is a combination of an engine and ladder company and can perform either function as necessary on a fire scene.
A. quint B. truck C. rescue company D. platform