Which statement about the inflammatory response is false?
a. Bradykinin causes increased capillary permeability.
b. Type I interferons and neutrophils secrete histamine.
c. Increased blood flow to infected areas brings more phagocytic cells.
d. Swelling results from an increase in the volume of interstitial fluid in the infected area.
e. Edema and certain enzymes in the plasma cause the pain associated with inflammation.
B
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The protection against a specific infectious disease that arises when all or nearly all of a population is vaccinated is termed
A) immune preparedness. B) mandatory vaccination. C) government-controlled health care. D) herd immunity.
The primary elements making up living organisms are
A. carbon, hydrogen, iron, sulfur, sodium, and calcium. B. carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus. C. carbon, hydrogen, oxygen, calcium, iron, and iodine. D. carbon, oxygen, iron, chlorine, sulfur, and phosphorus. E. carbon, oxygen, sulfur, calcium, iron, and phosphorus.
A population declines when
A. animals are removed randomly. B. death rate exceeds reproductive rate. C. reproductive and death rates are equal. D. reproductive rate exceeds death rate. E. smaller animals are selectively removed.
The rate of molecule movement in electrophoretic gels depends on three parameters of molecular structure
Each of these parameters individually is important in determining how a particular molecule migrates, but they can also interact with one another to produce a characteristic migration rate for each molecule. What are the three parameters?