Module 5: Structure and Function of Plasma Membranes

In this module, we learn that the purpose of the cell membrane, also known as the plasma membrane, is to maintain the integrity of the cell's interior by selectively allowing substances enter into the cell while keeping others out. The outer surfaces of cell membranes are hydrophilic, whereas the interior layer is hydrophobic. This characteristic enables the membrane to function as a possible filter for the movement of various compounds in solution.  In many animal cells, the cell membrane functions as a basis of attachment for the cytoskeleton, whereas in others, it serves as a foundation of attachment for the cell wall.

1. Understand the cell membrane fluid mosaic model (Course Outcome #2)
   
2. Describe phospholipid, protein, and carbohydrate functions in membranes (Course Outcome #2)
3. Discuss membrane fluidity (Course Outcome #2)
4. Explain why and how passive transport occurs (Course Outcome #2)
5. Understand the osmosis and diffusion processes (Course Outcome #2)
6. Define tonicity and its relevance to passive transport (Course Outcome #2)
7. Understand how electrochemical gradients affect ions (Course Outcome #2)
8. Distinguish between primary active transport and secondary active transport (Course Outcome #2)
9. Describe endocytosis, including phagocytosis, and receptor-mediated endocytosis (Course Outcome #2)

To achieve these objectives: 

1. Read the Module 5 Introduction 
   
2. Read and view the materials in the Module 5 Pressbooks book, embedded below by section for the chapter titled Structure and Function of Plasma Membranes.
3. Complete the assignment and discussion forum post and response

This module's lab activity is included as well, to occur in the lab class. Slides are available to accompany the class lecture. 

Module Pressbooks Resources and Activities