During conscious quiet rest, the brain is emitting
a. alpha waves.
b. beta waves.
c. delta waves.
d. gamma waves.
e. rapid, irregular waves.
A
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Each type of cone cell is stimulated by a different color of light. In humans, a colorful scene is perceived as a combination of signals from three cone types. Which colors correspond to these three cones?
I-Red II-Yellow III-Orange IV-Blue V-Green VI-Purple A. I, II, and III B. I, III, and IV C. I, IV, and V D. I, V, and VI E. II, IV, and VI
The frequency of mutations does not necessarily decrease or increase over time
a. true b. false
Marina has owned a bar for many years and extols the health benefits of alcohol. Which of these claims is correct?
A) Moderate consumption raises the "good" cholesterol levels. B) Heavy drinking prevents cancer. C) Four to five drinks per day improve the liver. D) Alcohol increases the uptake of vitamins and minerals.
Which of the following is a key diagnostic indicator of infection with Mycobacterium leprae?
A. blister-like lesions B. a distinctive red rash that lasts for days C. pus-filled abscesses D. localized loss of the sense of touch E. severe inflammation with swelling