Kidney stones are primarily composed of
A) cholesterol and esters of other steroid compounds
B) crystals and proteins that grow in the renal medulla
C) heavy metals that precipitate in the urinary filtrate
D) salts of weak acids that serve as buffers in the nephron
Answer: B) crystals and proteins that grow in the renal medulla
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When the palatine processes of the maxillary bones do not fuse properly, resulting in an opening between the oral and nasal cavities, the condition is known as
A. cleft chin. B. deviated septum. C. cleft lip. D. cleft palate. E. clogged sinus.
The sympathetic nervous system has its cells of origin in the brain stem as well as the spinal cord
Indicate whether the statement is true or false
Assume a couple has just completed intercourse, and sperm cells have been deposited in the woman's reproductive tract. Trace the pathway of the sperm cells through the female reproductive tract to the point where fertilization will most likely occur.(1) Cervix(2) Uterine tube(3) Cavity of uterus(4) Vagina
A. 1, 2, 3, 4 B. 4, 3, 2, 1 C. 4, 1, 3, 2 D. 1, 3, 2, 4 E. 4, 3, 1, 2
Which cells secrete highly alkaline mucus to protect the stomach walls from the hostile environment caused by the acid and digestive enzymes produced in the stomach?
A. Chief cells B. Endocrine cells C. Mucous cells D. Parietal cells