In streptococcal toxic shock syndrome, pathology results from toxins in the bloodstream which may cause both a red skin rash, as well as
A) a decrease in blood pressure leading to organ failure.
B) formation of a blue- or green-colored pus.
C) release of foul-smelling gases from the infection site.
D) peeling away of the epidermal layer of skin.
E) degradation of connective tissue.
Answer: A
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Lactose induces the transcription of the lactose operon by:
a. binding to the allosteric site of the repressor after being converted to allolactose. b. stimulating lactose metabolism in the cell. c. binding to the glucose operon, making it inoperable. d. binding to the allosteric site of RNA polymerase. e. inhibiting the activity of CAP.
Sometimes the immune system overreacts from exposure to a normally harmless substance such as cat hair. Subsequent exposure to this allergen elicits a massive inflammatory response
Because the chemical histamine is the cause of this inflammation, what cell type is most likely behind the problem? A) neutrophils B) basophils C) lymphocytes D) monocytes
The condition where tissue from the uterine lining grows outside the uterus is called ______________
A. endometriosis B. pelvic inflammatory disease C. uterine prolapse D. ectopic pregnancy
The most important evidence that Darwin used to develop his theory of natural selection came from ____.
A. the Argentine pampas B. his boyhood neighborhood in England C. the Galápagos Islands D. Australia and New Zealand E. South America