Which hormone stimulates the distal tubules to reabsorb more sodium?
a. ADH
b. renin
c. angiotensin I
d. angiotensin II
e. aldosterone
ANSWER: e
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Migration is going to have what kind of effect on the genetic variation between populations?
A. decrease variation B. increase variation C. will not affect variation D. maintain variation
Upon the initial infection of a host cell by bacteriophage ?, the first two proteins produced from expression of the phage genome are:
A. cI and cII. B. N and cI. C. N and Cro. D. Cro and cI.
You disrupt all hydrogen bonds in a protein. What level of structure will be preserved?
A) primary structure B) secondary structure C) tertiary structure D) quaternary structure
Why are invasive procedures likely to increase the risk of nosocomial infections?
A) These procedures allow microbes from the skin to enter the bloodstream of the patient. B) Invasive procedures must use antibiotics. C) These procedures are carried out by health care workers, who carry resistant microbes. D) Invasive procedures require long term hospital stays, thereby increasing the number of visitors seen by the patient.