Because aldosterone encourages the secretion of potassium ions into the urine, conditions in which excess aldosterone is secreted results in
a. hyponatremia
b. hypokalemia
c. hypotension
d. idiopathic atrophy
e. none of the above
B
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The electron transport chain is involved in
a. the oxidation of cofactors (NADH and FADH2) reduced during oxidation of citric acid cycle intermediates. b. the transport of hydrogen ions from the mitochondrial matrix to the intermembrane space. c. generating water. d. all of these e. none of these
Which of the following is a characteristic of mature red blood cells?
A. They have numerous mitochondria. B. They lack a nucleus. C. They play an important role in immune defense. D. They carry most of the carbon dioxide that is transported in the blood. E. They are able to undergo mitosis.
A friend just started taking Zoloft (an SSRI) and is experiencing an upset stomach and diarrhea. Your friend asks if the drug is causing her symptoms and you respond:
a. Yes, because the drug is irritating her stomach lining and that explains her symptoms. b. Yes, because serotonin is located both in the brain and the digestive tract, so the drug is altering digestive system functioning. c. No, because the drug is supposed to elevate mood and affect brain function, and it shouldn't have any effect on the digestive system. d. No, because the drug is quickly absorbed from the digestive tract and does not remain in the digestive system long enough to have any effect there.
How many codons are present in the following strand of mRNA? U A C G G U A G U A U G
A) 12 B) 6 C) 3 D) 4