Which one of the following is an extension of plasma membrane?
A) centrioles
B) centromeres
C) microfilaments
D) cilia
E) microtubules
Answer: D
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Which are often associated with mucin-secreting goblet cells?
A. Flagellum B. Cilia C. Cisternae D. Microvilli E. Ribosomes
Which of the following statements regarding erection is false?
A) It involves parasympathetic stimulation. B) Vascular channels in the erectile tissue become engorged with blood. C) Dilation of penile arteries occurs. D) It involves nitric oxide production by neurons. E) It is commonly the result of plaque in the blood vessels of the penis.
What best exemplifies enzymatic hydrolysis?
A) mastication B) absorption C) nutrient breakdown D) segmentation
A 25-year-old woman sees her doctor because of hirsutism (inappropriate hair growth) and excessive acne. At examination, her blood pressure is 150/90 mm Hg (elevated)
Blood work reveals normal Na+ but low/normal K+ levels. Testosterone and dihydrotestosterone (DHT) levels are in the high end of the normal range, and DHEAS and ACTH are moderately elevated. Her physician suspects late-onset congenital adrenal hyperplasia due to subnormal activity of an adrenal enzyme. The "hyperplasia" associated with congenital adrenal hyperplasia is due to elevated levels of: A. DHEAS B. cortisol C. ACTH D. aldosterone E. deoxycorticosterone (DOC)