Molecules that serve as chemical signals to open or close gated ion channels are
A. responders.
B. ligands.
C. isotopes.
D. communicators.
E. membrane potentials.
B
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Which portion of the peritoneum drapes over the transverse colon and coils of the small intestine?
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How many erythrocytes are in each milliliter of blood?
a. 50 million b. 500 million c. 1 billion d. 5 billion e. 15 billion
The major importance of regulating ECF osmolarity is
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What part of the midbrain carries sensory tracts from the spinal cord?
A. tectum B. cerebral peduncles C. tegmentum D. red nucleus