Regular physical exercise contributes to healthy aging by enhancing or protecting all of the following EXCEPT
A. fluid intelligence.
B. lung capacity.
C. hearing ability.
D. immune functioning.
Answer: C
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A) 468 cm3 B) 0.468 cm3 C) 46.8 cm3 D) 4680 cm3 E) 4.68 cm3
_____ grids, composed of a grid of fine lines, can detect distorted, incomplete, or wavy images in the central vision field
A) Amsler B) Meniere's C) Ophthalmoscope D) Snellen
One hundred children with strep throat are tested by a new technique; 98 of them test positive and 2 of them test negative. One hundred children who do not have strep are also tested, and 5 of them test positive
a. The sensitivity of the assay is 95%. b. The sensitivity of the assay is 99%. c. The sensitivity of the assay is 98%. d. The specificity of the assay is 98%.
Nuclear medicine is the use of ________ to produce an image
A) ultrasound waves B) radioactive substances C) X-rays D) electromagnetic energy