The buildup of mucus and blockage of airways in pertussis is due to
A. endotoxin.
B. lipopolysaccharide.
C. toxins that destroy the ciliated cells of the respiratory tract.
D. Pseudomonas aeruginosa.
E. the presence of a capsule.
Ans: C. toxins that destroy the ciliated cells of the respiratory tract.
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With which type of microscopy would one observe three-dimensional structure?
A. fluorescence microscopy B. standard light microscopy C. confocal microscopy D. differential-interference light microscopy E. transmission electron microscopy
Which of the following is true about Bergey's Manual?
A. The first edition is mostly phenetic while the second edition is more phylogenetic. B. The first and second editions are both largely phylogenetic. C. The first edition is largely phylogenetic while the second edition is more phenetic. D. The first and second editions are both largely phenetic.
Conversion of Vitamin D by the kidneys to an active form is an example of the urinary system's
homeostatic interaction with which system? a. skeletal b. cardiovascular c. digestive d. endocrine e. muscular
Profilin does all of the following except
A) competes with thymosin ?4 for binding to actin monomers. B) sequesters actin monomers to prevent any polymerization. C) binds to formin in order to "stage" actin monomers for addition to a growing filament. D) promotes actin monomer addition to a filament plus end. E) Profilin does all of the above.