• The cell membrane is selectively permeable, meaning only some molecules can get through.
  • The composition of the cell membrane helps to control what can pass through it.
  • The membrane is made of a double layer of phospholipids (a "bilayer") and proteins.
  • The fluid nature of the membrane is important in maintaining homeostasis.
  • It allows the proteins in the membrane to float to areas where they are needed.
  • Use the resources below to answer the following questions: Active and Passive Transport at (6:13)
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