About This Chapter
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- Begin your assignment or other high school biology work.
- Identify the nervous, immune, and endocrine systems concepts that you're stuck on.
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- Explain how homeostasis and temperature are regulated in humans.
- Learn how hormones control glucose levels and how malfunction of these hormones can cause diabetes.
- Describe the functions of the nervous system.
- List the structures and functions of neurons.
- Become familiar with the roles of the central and peripheral nervous systems.
- Discuss the roles of the sympathetic and parasympathetic nervous systems.
- Name the brain's structures and their functions.
- Describe the structures and functions of the cerebral cortex.
- Discuss the lines of defense in the innate immune system, such as inflammation, natural killer cells and neutrophils.
- Learn about the mechanisms of acquired immunity, including antibodies, T cells and B cells.
- Explain how antibiotics and vaccines aid our immune systems.
- Describe how our immune systems can evade flu viruses and HIV.
- Learn how to determine the virulence of pathogens and describe the challenges of antibiotic resistance.
1. 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.
2. Homeostasis of Glucose Levels: Hormonal Control and Diabetes
In this lesson, we'll look at how the body uses hormones to maintain homeostasis of blood glucose levels, what happens in people who have diabetes, and how diabetics can manage their disease.
3. 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!
4. 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.
5. The Central and Peripheral Nervous Systems
Did you know that hammerhead sharks and platypuses share a special type of sensory neuron that humans and most other animals don't have? In this lesson, you'll find out what that sensory neuron and a whole lot of others can do. You'll also learn how the nervous system is organized and the differences between the central and peripheral nervous systems.
6. 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!
7. Brain Structures and Functions Part I
The brain's complexity can often be difficult to understand because it serves so many important functions. In this lesson, you'll get a little help from Nrr, the alien biologist, who will guide you through understanding the structure and functions of the human brain.
8. The Cerebral Cortex: Brain Structures and Functions Part II
Check out this video lesson to learn about the four lobes of the human brain - the frontal, parietal, occipital and temporal. You'll learn about the functions and processes of each region.
9. Innate Immunity: Inflammation, Neutrophils & Natural Killer Cells
You might already know how your body handles known infectious agents but how about unknown? Watch this video to explore your innate immune system - your body's defense against new bacteria and viruses.
10. Acquired Immunity: T Cells, B Cells and Antibodies
Have you ever wondered why some people don't ever seem to get sick? These people likely have an acquired immunity. Learn more about the immune system and how exposure to an illness one time can help your body to prevent that illness from ever occurring again.
11. Antibiotics and Vaccines
Do you know why children must get regularly vaccinated? Have you ever wondered how an antibiotic works and why they are so widely prescribed? If so, this lesson will help you to understand how changes in medicine have almost eliminated several deadly diseases and added decades to the average person's lifespan.
12. Pathogens: Antibiotic Resistance and Virulence
Find out more about how the overuse of antibiotics could lead to some serious problems with epidemics or untreatable diseases in the future. You can also discover some of the things that make pathogens harmful and why pathogens don't cause disease in every species they infect.
13. Oxidative Phosphorylation: Definition, Steps & Products
Learn about the process through which living cells metabolize glucose. This article will focus on what oxidative phosphorylation is, the key steps leading up to oxidative phosphorylation, and the end results.
14. Histamine: Definition, Effects & Role
Histamine is a chemical produced and stored within the body. It is a part of our immune response and is released during an allergic reaction. Learn more about this substance and quiz yourself at the end.
15. Parts of the Eye and their Functions
Do you know the parts of the eye? If not, this lesson will help you to identify the parts of the eye and understand their specific functions. After learning about the eye, you will be able to test your knowledge with a quiz.
16. Adenoid: Definition, Symptoms & Removal
Read this lesson to learn what an adenoid is along with why we have them and what problems they can cause. You will also learn what can be done to remedy those problems.
17. What Are Eosinophils? - Definition & Function
Eosinophils are a specific type of white blood cell that protects your body against certain kinds of germs, mainly bacteria and parasites. They're also what causes you to have allergic reactions. Read about how eosinophils function in your body to try to protect you.
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