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Membranes Structure, Function, Transport
A plasma membrane is kind of like skin. It is the outer boundary of the cell. It regulates the content of the cell, and affects how the cell functions in the body. In this chapter, we examine the structure of the plasma membrane often described as a fluid mosaic because of the many structures embedded within it. Additionally, we study how materials pass into and out of the cell. Some materials pass passively, while others must be actively transported across. Beneficial materials pass into the cell, while wastes leave, and all the while hazardous materials are kept at bay.
You will learn the main structural parts of the plasma membrane and how each of these structures work together.
Second, you will examine how materials are transported into and out of cells. There are several processes you must understand.
Instructions - complete the following
Read Inquiry into Life text pg 67-70.
Lessons
The Fluid Mosaic Model of the Cell Membrane (slides 1-20)
Transport Across the Membrane - Selective Permeability (slides 20-53)
Review the following animations of the Cell
Inside the Cell Membrane with the Amoeba Sisters
Video - Overview of the Plasma Membrane
Transport Across the Membrane with the Amoeba Sisters
Review the following flash animations on passive transport (no energy required because materials pass DOWN a concentration gradient)
Osmosis with the Amoeba Sisters
Diffusion with the Amoeba Sisters
Watch the following animations on Active Transport (energy input is necessary as materials pass UP a concentration gradient)
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