The most delicate of the meninges consists of elastic and collagen fibers and is known as the
A. pia mater.
B. dura mater.
C. falx cerebri.
D. arachnoid mater.
A
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An area of the retina that contains only cones and is the site of sharpest vision is the
A) outer segment. B) inner segment. C) fovea. D) optic disc. E) tapetum lucidum.
The interphalangeal joints are what type joints?
A. hinge B. condyloid C. saddle D. none of the above
Define electrolytes
A) Electrolytes are enzymes that create energy in a solution. B) Electrolytes are enzymes that lower the activation energy for a solution. C) Electrolytes are ions that will conduct an electrical current in a solution. D) Electrolytes are hydrophobic and will create an electrical barrier between the hydrophobic substances and the hydrophilic substances in a solution. E) Electrolytes are sugar polymers used to rehydrate by increasing plasma volume.
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 subnormal activity of which enzyme explains both the elevated adrenal androgens (e.g., DHEAS) AND hypertension (elevated blood pressure)? A. CYP11B1 B. CYP17 C. CYP21A2 D. CYP11B2 E. CYP11A1