Which of the following skin changes is usually associated with aging?
A. Loss of subcutaneous tissue contributes to sagging of the skin.
B. The amount of collagen in the dermis increases.
C. Localized increase in sebaceous glands leads to dry skin.
D. There is an increase in the number of elastic fibers in the skin.
E. Skin becomes thicker.
Answer: A
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The right border of the heart is supplied by the
A. circumflex artery. B. posterior interventricular artery. C. anterior interventricular artery. D. right marginal artery. E. great cardiac vein.
Which muscle is a major chewing muscle?
A) Sternohyoid B) Digastric C) Masseter D) Hypoglossus
Which of the following statements is true regarding parasympathetic tone?
A) It might increase or decrease heart rate depending on the situation. B) It accelerates the resting heart rate above its intrinsic rate. C) It holds the resting heart rate below its intrinsic rate. D) It affects heart rate only after myocardial infarction. E) It does not affect heart rate.
The transition from an afferent arteriole to an efferent arteriole occurs in the ________
A) cortical radiate veins B) medulla C) vasa recta D) peritubular capillaries E) glomerulus