Which of the following is NOT part of the inflammatory response?
A) Localized tissue swelling
B) The release of histamine
C) Migration of phagocytes to the site of injury
D) The release of antibodies
E) Elevated body temperature
D
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Which of the following characteristics differentiates mast cells from neutrophils and monocytes?
A. Mast cells participate in the inflammatory response. B. Mast cells do not act as phagocytes. C. Mast cells are derived from bone marrow. D. Mast cells originate as stem cells.
Where is partial pressure of CO2 the highest?
a. atmosphere b. skeletal muscle c. capillary bed in alveolus d. alveolus (lung air sac)
Forests influence local climates by
A) releasing water into the atmosphere. B) increasing the temperature via photosynthesis. C) increasing the amount of water runoff. D) increasing evaporation by blocking winds. E) releasing carbon dioxide.
What is the correct sequence of events in cross-bridge cycling?
A. Myosin cross-bridge binds to actin, the powerstroke moves the thin filament relative to the thick filament, ATP binds to myosin and cross-bridge detachment occurs, ATP is hydrolyzed and the myosin head is "cocked" B. The powerstroke moves the thin filament relative to the thick filament, myosin cross-bridge binds to actin, ATP binds to myosin and cross-bridge detachment occurs, ATP is hydrolyzed and the myosin head is "cocked" C. Myosin cross-bridge binds to actin, ATP is hydrolyzed and the myosin head is "cocked," the powerstroke moves the thin filament relative to the thick filament, ATP binds to myosin and cross-bridge detachment occurs D. Myosin cross-bridge binds to actin, ATP binds to myosin and cross-bridge detachment occurs, the powerstroke moves the thin filament relative to the thick filament, ATP is hydrolyzed and the myosin head is "cocked" E. These events can occur in any sequence without affecting muscle function.