Voters have recently decided to have fluoride added to the city water system. Epidemiologists wanting to study the effect of fluoride on dental caries would be conducting a(n)
a. Ecological study
b. Double-blind study
c. Community trial
d. Screening
ANS: C
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A 51-year-old woman who was born congenitally blind and deaf is able to distinguish individuals by light touch of the individual's face. Which of the following components of the woman's skin innervation likely contributes the most to this ability?
A) Ruffini corpuscles B) Meissner corpuscles C) Pacinian corpuscles D) Nociceptors
Pilot studies are done for which reason?
a. Conceptualize the project b. Develop and refining a planned study c. Generalize findings to a population d. Identify gaps in knowledge
A patient begins taking nitroglycerin for acute angina attacks and comes to the clinic for a follow-up appointment. The patient reports the development of a headache when taking a ni-troglycerin tablet. What information should the nurse provide?
a. Headache is common because of the vasodilatory effects of the medication. b. Headache means that the levels of the nitroglycerin are effective. c. Headache could mean the dose is too high, causing vasodilation. d. Headache is an atypical symptom, but blood pressure should be checked.
The female pelvis is visually divided into three planes. The first plane is known as which of the following?
a. Pelvic inlet c. Pelvic outlet b. Midpelvis d. Obstetrical conjugate