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Kiaalyce1 Kiaalyce1
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6 years ago
Which of the following describes selective permeability?
 
  a. Ions can only travel in certain directions across the membrane.
  b. Only certain molecules are allowed to cross the membrane freely.
  c. Only certain types of stimulation will result in an action potential.
  d. All molecules must pass through designated channels.
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wrote...
6 years ago
b
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