Sandhu has type 1 diabetes, so he must frequently inject himself with insulin. He has to be careful not to inject himself too often or with too much of the hormone because this vital chemical will virtually disappear from his bloodstream
A) glycogen B) oxygen C) glucose D) Oxycontin
Answer: C
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All steroid hormones are synthesized from ________.
Fill in the blank(s) with the appropriate word(s).
Sewage and waste from waterways is controlled with
a. sewage treatment. b. chlorine. c. UV disinfection. d. solar aquatic systems. e. all of these.
Economists have been comparing the monetary value of intact habitats with the value of using (destroying) those habitats (such as for logging or farming). They find
A. the intact habitat is more valuable than the destroyed one in most cases studied. B. increased invasion in intact habitats renders it worthless within a few years. C. the immediate economic gain is worth it, such as in the shrimp farms in Thailand. D. clearing the forest for agriculture, as in Cameroon, provides jobs, housing, and long-term economic benefits. E. the long-term problems are minimal, and usually economically minor, it is more of an aesthetic problem than a monetary one.
The ability of some microbes, such as Trypanosoma or Giardia to alter their surface molecules and evade destruction by the host's antibodies is called
A) antigenic variation. B) lysogenic conversion. C) virulence. D) cytopathic effect. E) cytocidal effect.