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Ch 48: Holt McDougal Modern Biology Chapter 49: Nervous System and Sense Organs

About This Chapter

The Nervous System and Sense Organs chapter of this Holt McDougal Modern Biology textbook companion course helps students learn the essential modern biology lessons of the nervous system and sense organs. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Nervous System and Sense Organs textbook chapter.

How it works:

  • Identify the lessons in the Holt McDougal Modern Biology Nervous System and Sense Organs chapter with which you need help.
  • Find the corresponding video lessons within this companion course chapter.
  • Watch fun videos that cover the nervous system and sensory organ topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Structure, function and types of neurons
  • Schwann cells, myelin sheath and nodes of Ranvier
  • Functions of the nervous system
  • Brain structures and functions
  • Functions of the central and peripheral nervous systems
  • Functions of the sympathetic and parasympathetic nervous systems
  • Roles of the olfactory bulb and the nose
  • Large structures of the eyes
  • Receptors at the back of the eye
  • Middle structures of the ear
  • Effects of drugs on the nervous system

Holt McDougal Modern Biology is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

13 Lessons in Chapter 48: Holt McDougal Modern Biology Chapter 49: Nervous System and Sense Organs
Test your knowledge with a 30-question chapter practice test
The Structure and Function of Neurons

1. 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.

Types of Neurons: Sensory, Afferent, Motor, Efferent & More

2. 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.

The Myelin Sheath, Schwann Cells & Nodes of Ranvier

3. 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.

Functions of the Nervous System

4. 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!

Brain Structures and Functions Part I

5. 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.

The Central and Peripheral Nervous Systems

6. 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.

The Sympathetic and Parasympathetic Nervous Systems

7. 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!

Taste, Touch & Smell: Proprioception & the Somatosensory System

8. Taste, Touch & Smell: Proprioception & the Somatosensory System

How do taste, touch and smell work? Also, what is proprioception? Throughout this lesson, you'll get a detailed description on each of these remarkable senses.

The Sense of Smell: Olfactory Bulb and the Nose

9. The Sense of Smell: Olfactory Bulb and the Nose

How does the sense of smell relate to your eyes? Why can we smell something in the first place? These questions and many more will be answered as we look into the olfactory bulb, chemoreceptors, cranial nerve I, and the olfactory nerve.

The Eye and Eyesight: Large Structures

10. The Eye and Eyesight: Large Structures

Would you be able to see anything without a lens in your eye? Does the lens change shape? Does the iris? What structure gives you your eye color? Find out all of this and about things like the ciliary muscles and the cornea as we delve into this lesson.

Receptors of the Back of the Eye: Retina, Rods, Cones & Fovea

11. Receptors of the Back of the Eye: Retina, Rods, Cones & Fovea

Find out how we see the world in color, what rods and cones are, and how camera film fits into all of this. In addition, you'll find out what the retina is and what gives you the ability to see at night.

The Ear: Middle Structures and Hearing Functions

12. The Ear: Middle Structures and Hearing Functions

Find out about the malleus, incus, and stapes. You'll learn about the smallest bones in your body and find out what the ossicles are for. Finally, you'll find out how the oval window plays an important role in the transmission of sound.

From Misuse to Abuse: Distinction & Effects

13. From Misuse to Abuse: Distinction & Effects

This lesson will differentiate drug misuse and abuse. You will also learn how the central nervous system is affected by drugs and what other effects drugs have upon the body.

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

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