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9 / 34  Why are ion channels necessary to transport ions into or out of a cell?
A  Ions are too large to diffuse through the membrane.
B  Ions are charged particles and cannot diffuse through the hydrophobic interior of the membrane.
C  Ions do not need ion channels to move through the membrane.
D  Ions bind to carrier proteins in the bloodstream, which must be removed before transport into
the cell.

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Source:  OpenStax, Genetics and evolution. OpenStax CNX. Aug 07, 2014 Download for free at https://legacy.cnx.org/content/col11595/1.2
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