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colleen colleen
wrote...
Valued Member
Posts: 17076
12 years ago
Describe the ways in which cell membranes are semipermeable.
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wrote...
Educator
12 years ago
Descriptions should include: hydrophilic substances requiring a transporter protein (unless they are less than 600 daltons in size); hydrophobic substances may pass through the membrane; ions require ion channels.
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