Unit 3: Discussion

Discussion Topic

Plasma Membrane Structure and Function

Cell membranes are critical to the survival and function of all cells; they keep cells isolated from the external environment and from other cells. The plasma membrane is said to be differentially or selectively permeable.

  1. What does it mean for a membrane to be selectively permeable?
  2. Select two specific components of the cell membrane and explain how each affects the permeability of the cell membrane. Meaning, what specific materials are regulated by the given component and how.
  3. Why is it important for a cell to regulate what molecules are able to pass into or out of the cell?

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