In general, water-soluble molecules diffuse through the ________; and lipid-soluble molecules diffuse through the ________.
A. membrane channels; membrane channels
B. lipid bilayer; membrane channels
C. membrane channels; lipid bilayer
D. lipid bilayer; lipid bilayer
E. None of the choices are correct.
Answer: C
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Indicate whether the statement is true or false
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Indicate whether the statement is true or false.
The group of pacemaker cells near the entrance of the superior vena cava forms the ________
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