Which muscle type is considered voluntary?
a. cardiac only
b. skeletal only
c. smooth only
d. both cardiac and smooth
e. both skeletal and smooth
b
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The Carboniferous Period is extremely significant to our current society because
A. mammals diversified. B. human evolution began in the period. C. plants and animals first adapted to a terrestrial environment during this period. D. the Carboniferous forests turned into the coal that fuels modern society.
The job of a natural killer cell is to:
A. release histamine. B. destroy invading pathogens through phagocytosis. C. destroy infected or abnormal host cells. D. trigger inflammation.
A phospholipid molecule has a polar and a nonpolar end. Because of this, water molecules form
A. polar bonds with the nonpolar end of the phospholipid molecule. B. polar bonds with the polar end of the phospholipid molecule. C. hydrogen bonds with the nonpolar end of the phospholipid molecule. D. hydrogen bonds with the polar end of the phospholipid molecule. E. covalent bonds with the nonpolar end of the phospholipid molecule.
CREB1 function as a (A)________, whereas CREB2 function as a (B)________. The consensus sequence for CREB1 and CREB2 is (C)_________.
a. (A) transcriptional activator (B) transcriptional repressor (C) same b. (A) transcriptional repressor (B) transcriptional activator (C) same c. (A) transcriptional activator (B) transcriptional repressor (C) different d. (A) transcriptional repressor (B) transcriptional activator (C) different