What type of gland possesses ducts?
A. hypocrine
B. exocrine
C. endocrine
D. ectocrine
E. epicrine
B
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The interstitial cells of the testes produce
A. seminal fluid. B. androgens. C. sperm cells. D. spermatogenic cells.
The structure of a ________ includes a core of nonpolar triglycerides and cholesterol esters coated by proteins, phospholipids, and some free cholesterol.
A. lipoprotein B. prostaglandin C. nucleic acid D. glycoprotein
When blood Ca2+ levels fall below normal, in what ways do the kidneys help restore them toward normal?
A. by increasing 1,25-dihydroxyvitamin D3 formation, decreasing tubular phosphate reabsorption, and increasing tubular Ca2+ reabsorption B. by increasing 1,25-dihydroxyvitamin D3 formation, increasing tubular phosphate reabsorption, and increasing tubular Ca2+ reabsorption C. by decreasing 1,25-dihydroxyvitamin D3 formation, increasing tubular phosphate reabsorption, and increasing tubular Ca2+ reabsorption D. Increasing 1,25-dihydroxyvitamin D3 formation and increasing secretion of parathyroid hormone E. by increasing renal secretion of parathyroid hormone and increasing bone resorption
ADH (antidiuretic hormone) is secreted in response to
A. overhydration. B. increased volume of the body fluids. C. increased osmotic pressure of the body fluids. D. high blood pressure. E. increased blood volume.