Cutaneous melanomas are associated with
A. short exposure to high-intensity sunlight.
B. exposure to background radiation.
C. prolonged exposure to low-intensity sunlight.
D. occasional exposure to X-rays.
Answer: A
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Lipogenesis is common for organic molecules because the intermediate ________ is formed in most nutrient metabolic processes
A) pyruvate B) acetyl-CoA C) glycerol D) glucose E) lipoprotein
When aldosterone is absent, Na+ reabsorption in the nephron is ________.
A. greatly decreased B. greatly increased C. unchanged
The three layers of the cerebellar cortex are the ________
A) molecular layer, Purkinje cell layer, and the cerebellar nuclei B) cerebrum, Purkinje cell layer, and the molecular layer C) molecular layer, granular layer, and the arbor vitae D) molecular layer, Purkinje cell layer, and the granular layer
Typically, a hilum of a lymph node contains
A. numerous efferent vessels. B. one efferent lymphatic vessel. C. one afferent lymphatic vessel. D. numerous afferent vessels.