Chapter 7 Cellular Structure and Function - Mrs. Cindy Williams Biology ...
[Pages:47]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.
Chapter 7 Cellular Structure and Function
Proteins Transmit signals inside the cell Act as a support structure Provide pathways for substances to enter and leave-
like sugars.
Chapter 7 Cellular Structure and Function
Carbohydrates Identify chemical signals
Cell Structure and Function
SPI 3210.1.2 Distinguish between prokaryotic and eukaryotic cells.
EQ-What is the main differences between these types of cells?
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