About This Chapter
The Human Nervous System - Chapter Summary and Learning Objectives
Watch the nervous system come to life through the animations and graphics in these videos. Subject-matter experts teach these lessons and explain the nervous system's functions, the role of neurons and the importance of the Myelin sheath. After viewing each lesson, you can take a quiz to test your comprehension of the material or review transcripts to locate key vocabulary. As you make your way through this chapter, you'll be able to:
- Find out how temperature is regulated in human bodies
- Observe positive and negative feedback in the nervous system
- Identify the structure of neurons and the different types
- Describe the function of neuroglia
|The Sympathetic and Parasympathetic Nervous Systems||Explore the two divisions that make up the nervous system.|
|Functions of the Nervous System||Detail the three primary functions of the nervous system.|
|Homeostasis and Temperature Regulation in Humans||Discover how your body maintains a consistent temperature.|
|Positive and Negative Feedback in the Sympathetic and Parasympathetic Nervous System||Examine the fight or flight instinct and get details on how it works.|
|The Structure and Function of Neurons||Scrutinize the ways that neurons send signals through the body and observe their structure.|
|Types of Neurons: Sensory, Afferent, Motor, Efferent & More||Delve into the various types of neurons and their uses in the body.|
|The Myelin Sheath, Schwann Cells & Nodes of Ranvier||Summarize the functions of these components of the nervous system.|
|Neuroglia: Function & Definition||Assess the jobs neuroglia cells perform and why they're important.|
1. The Sympathetic and Parasympathetic Nervous Systems
In this lesson, you'll learn about two subdivisions of the autonomic nervous system - the sympathetic and parasympathetic nervous systems. Watch as a hiker, Phil, runs away from a terrifying bear and see how these systems react to the impending danger!
2. Functions of the Nervous System
In this lesson, we'll watch Timmy as he plays in his backyard. Watch what happens when he tries to catch a butterfly, hears a mean dog bark, and scrapes his knee. All of Timmy's reactions are tied to his nervous system. For a full explanation of what goes on in the human nervous system, check out the video!
3. Homeostasis and Temperature Regulation in Humans
Do you wonder how your body is able to maintain a consistent temperature? Have you ever questioned why you get goosebumps when you're cold? This lesson will introduce you to homeostasis and answer your questions about body temperature regulation and reactions, like goosebumps.
4. Positive and Negative Feedback in the Sympathetic and Parasympathetic Nervous System
In this lesson, you'll study positive and negative feedback in the sympathetic and parasympathetic nervous systems. You'll also learn why we have a fight or flight instinct and how it works.
5. 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.
6. Types of Neurons: Sensory, Afferent, Motor, Efferent & More
There are many types of neurons in your body that help you see, smell, hear, and move. In this lesson, you'll learn more about afferent, efferent, sensory, and motor neurons.
7. The Myelin Sheath, Schwann Cells & Nodes of Ranvier
The myelin sheath is an essential part of our nervous system. Learn more about this neuron component, explore the nodes of Ranvier, and discover why Schwann cells are crucial for neuron survival.
8. Neuroglia: Function & Definition
In this lesson, you'll learn about the unsung heroes of your nervous system. These cells don't get a lot of attention, but without them, it would be difficult for your neurons to do their job and protect themselves against invaders.
9. Peripheral Nervous System: Definition, Function & Parts
The human nervous system is very complex with many interactive units that are changing constantly to reflect human behavior and activity. This lesson focuses on the peripheral nervous system, including its function and parts.
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