What is the effect of increased levels of parathyroid hormone?
A) Increased blood calcium levels
B) Decreased blood calcium levels
C) Increased estrogen levels
D) Decreased metabolism
E) Increased metabolism
A
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How much mercury can the average human safely consume per day?
a. 2 micrograms b. 7 micrograms c. 12 micrograms d. 55 micrograms e. 90 micrograms
Which of the following is NOT a response to low
temperature that increases the chance for survival? a. hypothermia b. shivering c. production of brown fat d. pilomotor response e. increased metabolism
As air rises over a mountain, it
A) cools and tends to lose moisture in the form of precipitation. B) cools and tends to gain moisture without precipitating. C) warms and tends to lose moisture in the form of precipitation. D) warms and tends to gain moisture without precipitating.
Aminoacyl tRNA synthetases are enzymes that
a. synthesize transfer RNAs. b. attach amino acids to specific transfer RNAs. c. connect amino acids while they are held in place on ribosomes by transfer RNAs. d. attach the terminal CCA sequence to transfer RNAs