Chapter 7 Cellular Structure and Function - Mrs. Cindy Williams Biology ...

Chapter 7 Cellular Structure and Function

Section 1: Cell Discovery and Theory Section 2: The Plasma Membrane Section 3: Structures and Organelles Section 4: Cellular Transport

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Chapter 7 Cellular Structure and Function

7.2 The Plasma/Cell Membrane

Thin, flexible boundary between the cell and its environment

Allows nutrients into the cell and wastes to leave.

Chapter 7 Cellular Structure and Function

Composed of the phospholipid bilayer. Consists of a glycerol backbone, two fatty acid

chains, and a phosphate group.

Chapter 7 Cellular Structure and Function

Selective Permeability or semi-permeable Lets some things in but not others. Sugars are

too big. Ex.-fish net, coffee filter See picture p. 187

Chapter 7 Cellular Structure and Function

Fluid Mosaic Model

The phospholipid bilayer allows other molecules (proteins, carbs, and cholesterol) to "float" in the membrane.

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