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Ch 20: Cellular Membranes & Structures

About This Chapter

Let these short videos help you understand the structure, function and composition of cell membranes and organelles. Use these lessons and accompanying resources to help you improve class performance, study for exams or learn for your own pleasure.

Cellular Membranes & Structures - Chapter Summary

This chapter teaches you about cell membranes and the organelles found within a cell. You will learn how cells acquire and digest food, how they excrete waste materials through the cell membrane, and how the fluid mosaic model illustrates its structure. The lessons also illustrate the components, structures and functions of the Golgi apparatus, endoplasmic reticulum, and ribosomes. When you're finished, you should know how to:

  • Discuss the fluid mosaic model of the cell membrane
  • Explain what ribosomes are, where they're found and what they do
  • Identify the definition and functions of endoplasmic reticulum
  • Examine the function and definition of Golgi apparatus
  • Describe exocytosis and endocytosis across cell membranes

Each of these short, well-presented video lessons is accompanied by a brief quiz so that you can measure what you've learned, and the chapter exam helps you test for overall mastery. Links between the quizzes and lessons allow you to check back and forth should the need arise. Our highly qualified expert instructors and subject-matter specialists are accessible if you have questions, and the convenient online platform places this study guide at your fingertips 24/7/365.

5 Lessons in Chapter 20: Cellular Membranes & Structures
Test your knowledge with a 30-question chapter practice test
The Fluid Mosaic Model of the Cell Membrane

1. The Fluid Mosaic Model of the Cell Membrane

In this lesson, we will discuss the components of the cell membrane and why the fluid mosaic model paints the best picture of its structure. We'll learn about the roles of the phospholipid bilayer, cholesterol, proteins and carbohydrates.

The Ribosome: Structure, Function and Location

2. The Ribosome: Structure, Function and Location

The ribosome is the cellular structure responsible for decoding your DNA. In this lesson, we'll learn about ribosome structure, function and location - characteristics that make it a very good genetic translator.

Endoplasmic Reticulum: Definition & Functions

3. Endoplasmic Reticulum: Definition & Functions

Cells are made of numerous organelles that perform specific functions. In this lesson, you will learn about the structure and functions of the endoplasmic reticulum.

Golgi Apparatus: Definition & Function

4. Golgi Apparatus: Definition & Function

Eukaryotic cells contain many organelles to carry out their life functions. One of these important organelles is known as the Golgi apparatus. In this lesson, we'll learn about the structure and function of this organelle.

Endocytosis and Exocytosis Across the Cell Membrane

5. Endocytosis and Exocytosis Across the Cell Membrane

In this lesson, we'll discover how some cells can eat, drink, and digest their dinner through the process of endocytosis and a structure called the lysosome. In addition, we'll learn how a cell can throw out the leftovers across the cell membrane during exocytosis.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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