Ch 26: Cellular Signals

About This Chapter

Watch this chapter as you go over cellular signals. Each of the lessons in this chapter offers a comprehensive study guide of these biology topics, which can assist you with brushing up on definitions, vocabulary words, and related biological processes.

Cellular Signals - Chapter Summary

Take a peek at this chapter as you review the process of cellular signals. Our instructors take special care to elaborate on key concepts, including an explanation of how cells recognize when to perform various activities and processes. All of the major terms related to cellular signals will be clearly defined within the lessons, making memorizing the terms that much easier to accomplish.

You will also go through a step-by-step guide that outlines the entire process and purpose of chemical signals being passed between cells. Our instructors show detailed diagrams and examples to help you further comprehend these topics. By taking the time to go through the chapter, you will be ready to:

  • Describe how cell communication happens
  • Identify the concept of signaling molecules
  • Define the different types of cytokines
  • Point out how signal reception and transduction works in cells
  • Explain the different cellular responses to these signals
  • Show the process of signal transduction in plants
  • Compare hydrophobic and hydrophilic signals
  • Outline the process of apoptosis
  • Examine the relationship between cancer and apoptosis in the cell cycle

A fun and fast way to check how well you understand these biology concepts includes answering our lesson quizzes. Every lesson in this chapter comes complete with a short, multiple-choice quiz. Quiz worksheets can also be printed to add to your notes, or you can use the worksheets as real-life practice for upcoming exams.

10 Lessons in Chapter 26: Cellular Signals
Test your knowledge with a 30-question chapter practice test
An Overview of Cell Communication

1. An Overview of Cell Communication

Cellular communication is an important process that allows cells to pass signals to one another. In this video lesson, you will be introduced to the process of cellular communication, identifying the three steps of cellular signaling in organisms.

Signaling Molecules: Definition & Concept

2. Signaling Molecules: Definition & Concept

How do cells know which processes and activities to perform? In this lesson, you will learn about the ways that cells receive information and how that information gets translated into a message that the cell can understand.

What Are Cytokines? - Definition, Types & Function

3. What Are Cytokines? - Definition, Types & Function

Cytokines are a group of proteins made by the immune system that act as chemical messengers. Learn about the functions of different cytokines, including chemokines, interferons, interleukins, lymphokines and tumor necrosis factor.

Signal Reception in Cells

4. Signal Reception in Cells

Our cells 'talk' to each other all the time through chemical signals. The first step of this process, reception, is a critical component. In this video lesson you will learn about this step in cell communication as well as understand its overall importance.

Transduction in Cells

5. Transduction in Cells

Once a cellular signal is received, a chain of events begins that helps the receiving cell decode the signal. In this video lesson you will learn about this second step of cellular communication and its importance to the overall process.

Cellular Responses to Signals

6. Cellular Responses to Signals

After reception of a signaling molecule and movement of that signal through transduction, the cell can now respond. There are different types of cellular response as well as different mechanisms the cell uses to make this process more efficient.

Signal Transduction in Plants: From Reception to Response

7. Signal Transduction in Plants: From Reception to Response

Why are plants so sensitive to environmental changes? In this lesson, we explore signal transduction in plants and see how this helps plants adapt to the world around them.

Signal Transduction for Hydrophilic & Hydrophobic Signals

8. Signal Transduction for Hydrophilic & Hydrophobic Signals

In this lesson we'll review signal transduction in cells. We'll examine the different between hydrophilic and hydrophobic signals and look at some examples such as isulin and steroid hormones.

What is Apoptosis? - Definition, Pathway & Examples

9. What is Apoptosis? - Definition, Pathway & Examples

This lesson will discuss apoptosis, giving a definition and overview of importance. It will also delve into a few of the pathways by which apoptosis occurs and give some examples of when apoptosis is induced.

Apoptosis in the Cell Cycle & Cancer

10. Apoptosis in the Cell Cycle & Cancer

Learn about natural cell death, called apoptosis, in normal cells and cancer cells, as well as treatments that are being developed to treat cancer by controlling apoptosis.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.