Rickettsiosis is caused by Rickettsia rickettsii, a pathogen that
A) produces powerful exotoxins.
B) provokes a severe immune response.
C) interferes with the host cell's Krebs cycle.
D) infects the lining of blood vessels and leads to leaking of plasma into tissue.
E) lyses the host's cells.
D
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What is the structure labeled as 9 in the accompanying figure?
a. style
b. pistil
c. ovary
d. anther
e. filament
In the microdilution broth dilution method, the interpretive criteria for the susceptible, interme-diate, or resistant categories are based on the:
a. quantitative differences (i.e., CFU/mL) in the turbidity in the test well. b. correlation of the MIC with se-rum-achievable levels of the common doses of the antimicrobial agent and the-rapeutic outcomes based on clinical stu-dies. c. either the presence or absence of zones of inhibition. d. FDA's recommendations based on a na-tional database of participating health care agencies providing antibiograms for re-view and publication as a summative re-port.
Sterol regulatory element binding proteins (SREBPs) are involved in regulating the synthesis of ____
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids
Which bone forms the lower sides of cranium and surrounds the ear canal?
a. frontal b. mandible c. sphenoid d. temporal e. occipital