Hydrogen peroxide is a chemical toxic to most cells and is produced by some human cells.
a. true
b. false
Ans: a. true
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How does the renal countercurrent multiplier mechanism allow the creation of a concentrated urine?
A. By pumping NaCl and urea into the ascending limb of the loop of Henle, it raises the solute load, which turns into a concentrated urine once water is extracted from the collecting duct. B. When anti-diuretic hormone is present, it stimulates the pumping of NaCl from the medullary interstitial fluid and water follows, concentrating the urine. C. By concentrating NaCl in the renal medullary interstitial fluid, it allows water to be reabsorbed from the collecting ducts when vasopressin is present. D. It transports NaCl from the medullary interstitial fluid into the collecting duct, which directly increases the osmolarity of the urine. E. It transports urea from the medullary interstitial fluid into the collecting duct, which directly increases the osmolarity of the urine.
A yoga move in which a foot is grasped and the leg is brought upward so the foot touches the buttock is an example of ________ at the knee joint.
Fill in the blank(s) with the appropriate word(s).
In diabetes insipidus, blood levels of ________ are decreased causing an increase in ________.
A) aldosterone : potassium in the urine B) aldosterone : sodium in the urine C) ADH : plasma volume D) ADH : urine volume E) insulin : glucose in the urine
A complete atom is electrically neutral because
A. the number of protons equals the number of neutrons. B. the number of electrons equals the number of protons. C. the number of electrons is greater than the number of protons. D. the number of electrons equals the number of neutrons.