About This Chapter
Nervous System & Sensory Mechanisms - Chapter Summary
The process of studying the nervous system and sensory mechanisms is made simple thanks to this chapter's entertaining lessons. Top instructors provide informative analyses of the cerebrum, sensory coding, the function of neurons and much more. Around-the-clock online access enables you to review these lessons at a comfortable pace. Upon completion of this chapter, you should be ready to:
- Define a nerve and associated terminology like neurons, stimulus and impulse
- Describe the structure and function of neurons
- Share the meaning of absolute threshold
- Discuss the function and identify the location of the cerebrum
- Explain how information is sent from sensory receptors to the brain
- Detail how our environment is impacted by stimuli
- Differentiate between sensation and perception
- List communication signals used among animals
All lessons in this chapter are presented in two formats: video and full transcript. Videos average 8 minutes each and feature timelines that let you skip to key topics, and transcripts allow you to read the lessons as texts and print them to review offline. With each lesson is a quiz you can use to test your comprehension of the concepts it covers. A practice chapter exam is also available to give you a broader review of the nervous system and sensory mechanisms.
1. What is a Nerve? - Definition & Associated Terminology
This lesson defines and explains what nerves are as well as associated terminology: neurons, receptors, impulse, stimulus, ascending and descending nerve tracts, ganglion, and plexus.
2. The Structure and Function of Neurons
In this video lesson, you'll learn about neurons, which are specialized cells in the nervous system. Check out how far neurons can send signals throughout the body and how depolarization is much like 'the wave' at a football game.
3. Absolute Threshold: Examples & Definition
In this lesson, we'll talk about what absolute threshold is and explore some examples of absolute threshold for the human senses - specifically for vision and hearing. In the end, test your knowledge with a quiz.
4. What is the Cerebrum? - Definition, Functions & Location
The cerebrum is a structure found in the brain. In this lesson, we will identify where the cerebrum is located in the brain and why it is vital to your everyday life.
5. Sensory Coding: Getting Messages from Receptors to Your Brain
When you stub your toe, you feel pain. But that's not all to the story: information about what your toe is feeling has to travel up to your brain. In this lesson, we'll look at the process of sending information from sensory receptors to the brain.
6. Stimuli: Definition & Examples
Stimuli are constantly affecting us and our daily lives. Therefore, it is important to understand how stimuli can cause changes in our environment and how we are able to adapt to them.
7. Receptor Processes & Sensory Mechanisms
How do we receive and interpret information from the world around us? In this lesson, we'll look at an overview of sensation and perception, including the differences between the two and the basic process of moving from one to the other.
8. How Animals Communicate: Chemical, Visual & Electrical Signals
Animals use a variety of different signals to communicate with each other. In this lesson you'll identify the different types of communication signals and the situations in which they might be most useful.
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