A man with a dirty cut on his hand appears at the emergency department for treatment. In order to clean the wound, the health-care provider should use
A) a solution of very low pH.
B) a solution of sterilized tap water.
C) a weak (low concentration) solution of salt water.
D) distilled water.
Answer: C
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A Barr body is an example of what?
A. Constitutive heterochromatin B. Facultative heterochromatin C. Constitutive euchromatin D. Facultative euchromatin
Where in the body does the circadian clock act to control of vascular disease?
a. Systems under positive feedback control. b. Systems under negative feedback control. c. Systems that develop early in life. d. Systems that develop later in life. e. It is not known.
Which of the following is not a function of adipose tissue?
a. storing food b. secretion c. storing fat d. insulation e. supporting organs
Trochophores, the free-swimming larvae of many mollusks, are propelled through the water by
A. flame cells. B. nephridia. C. cilia. D. flagella. E. the radula.