About This Chapter
The Nervous System at the Cellular Level - Chapter Summary and Learning Objectives
The nervous system is part of the control panel in the body. It helps coordinate movements and transmits signals to ensure the body functions properly. In this chapter, we will cover different aspects of the nervous system, such as its basic functions, types of neurons and sensory nerves. You'll learn about how this important system helps your body to function properly and how each nerve and part of this system is essential. Our lessons will cover everything from the overall system to the smallest parts of the system. Some of the things you will learn about include:
- The difference in sympathetic and parasympathetic
- How temperature is regulated in humans
- Positive and negative feedback in the nervous system
- The structure of neurons
- Schwann cells
- Nerves and receptors in muscles
|The Sympathetic and Parasympathetic Nervous Systems||Discover the different functions of these two systems.|
|Functions of the Nervous System||Explore how the nervous system works.|
|Homeostasis and Temperature Regulation in Humans||Examine the processes of homeostasis and temperature regulation.|
|Positive and Negative Feedback in the Sympathetic and Parasympathetic Nervous System||Analyze the role of positive and negative feedback in the nervous system.|
|The Structure and Function of Neurons||Find out more about neurons.|
|Types of Neurons: Sensory, Afferent, Motor, Efferent & More||Study the different types of neurons.|
|The Myelin Sheath, Schwann Cells & Nodes of Ranvier||Discover what the myelin sheath, Schwann cells and nodes of Ranvier have in common.|
|Neuroglia: Function & Definition||Explore the neuroglia.|
|Sensory Nerves: Types and Functions of Sensors and Receptors||Learn about the types and functions of sensory nerves and receptors.|
|Sensory Nerves and Receptors of Muscles and Tendons||Find out more about the job of sensory nerves and receptors in the muscles and tendons.|
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. Sensory Nerves: Types and Functions of Sensors and Receptors
In this lesson, we will explore what gives you the ability to sense temporary and sustained pressure, touch, and vibration. In addition, we'll touch base on certain nerves that allow you to sense the coolness of an ice cube in your mouth or the sensation of warmth on your skin.
10. Sensory Nerves and Receptors of Muscles and Tendons
Your body is able to sense its position in the environment. This is critical for movement, playing basketball, or even sitting still. Find out what this means as we explore proprioceptors, muscle spindles, and tendon organs.
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Other chapters within the Biology 105: Anatomy & Physiology course
- Overview of Anatomy and Cell Biology
- Human Respiratory System
- Cardiovascular System
- Blood Vessels
- Digestive System
- Urinary System
- The Endocrine System
- The Brain
- The Five Senses
- Muscle Physiology
- Gross Anatomy of Muscular System
- Connective Tissue
- Skeletal System
- Male and Female Reproductive Systems
- Studying for Biology 105