Smooth muscle cells are activated when Ca2+binds to:
A. calmodulin.
B. troponin.
C. tropomyosin.
D. myosin kinase.
E. myosin.
A
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The specimens of choice for detecting nontuberculous mycobacterial disease are:
a. spontaneously produced sputa. b. gastric lavages. c. transtracheal aspirations. d. bronchial lavages, washings, and brush-ings.
The process of introducing a needed, normal gene into human cells is called DNA mapping.
Answer the following statement true (T) or false (F)
Researchers Tilman and Downing have demonstrated which of the following?
A) more stable biomass production during drought in high-diversity systems B) more stable biomass production during winter in high-diversity systems C) more stable biomass production under fertilization in high-diversity systems D) more stable biomass production under pesticide application in high-diversity systems
A thick filament consists of
A) actin molecules. B) myosin molecules. C) actin and myosin molecules.