________ is a protein that works to strengthen and firm the skin.

A. Melanin
B. Keratin
C. Corneum
D. Stratum


Answer: B

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The four main sources for drugs include:

a. animals. c. minerals. b. plants. d. all of the above.

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First arriving firefighters at an alarm activation should dismount the apparatus wearing ____.

A. full PPE except for SCBA B. full PPE with SCBA C. uniforms D. SCBA only

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Solve for X in the proportions. Round to the nearest whole number. X/150 = 6/60

Fill in the blank(s) with the appropriate word(s).

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The oral surgery office is at a(n) __________ level of risk for cross-contamination due to the possibility of contact with blood

a. equal b. decreased c. increased d. none of the above

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