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Ch 5: ILTS Environmental Science: Characteristics and Life Functions of Organisms

About This Chapter

Let us teach you about characteristics and life functions of organisms. The video lessons and self-assessment quizzes in this chapter can prepare you to answer questions about life science on the ILTS Science: Environmental Science content area test.

ILTS Science: Environmental Science - Characteristics and Life Functions of Organisms: Chapter Summary

Refresh your knowledge of multicellular organisms and their make-up, including their brain structures and functions, through this chapter. Questions about characteristics and life functions of organisms are featured in the life science subarea of the Illinois Licensure Testing System (ILTS) Science: Environmental Science content area test, which is a component of the state's teacher certification process. This series of brief online video lessons covers the following topics:

  • Types of connective tissue
  • Pathogens: Antibiotic resistance and virulence
  • Acquired immunity: T cells, B cells and antibodies
  • Flu viruses, HIV and immune system invasion
  • The structure and function of neurons
  • Innate immunity: Inflammation, neutrophils and natural killer cells
  • Homeostasis and temperature regulation in humans
  • Homeostasis of glucose levels: Hormonal control and diabetes
  • Antibiotics and vaccines

ILTS Science: Environmental Science - Characteristics and Life Functions of Organisms Objectives

The ILTS Science: Environmental Science content area test is offered to aspiring Illinois public school teachers just six days out of each year. The test features 125 multiple-choice questions, which encompass six subareas: science and technology, life science, physical science, Earth systems and the universe, the physical and living environment, and environmental issues. You'll have approximately five hours and 45 minutes to finish the test, though you're unlikely to need that much time.

This chapter on characteristics and life functions of organisms was put together as a study guide for ILTS test-takers. It features a number of video lessons, each accompanied by a self-assessment quiz. As you prepare for the ILTS, take these quizzes and watch the videos as often as you need to feel comfortable with the material presented.

12 Lessons in Chapter 5: ILTS Environmental Science: Characteristics and Life Functions of Organisms
Test your knowledge with a 30-question chapter practice test
Multicellular Organisms, Tissues and Epithelium

1. Multicellular Organisms, Tissues and Epithelium

In this lesson on multicellular organisms, you'll take a look at what it actually means to be multicellular and how cells are organized into tissues, organs, and organ systems. This lesson also covers one of the four main tissue types: epithelial tissue.

Types of Connective Tissue

2. Types of Connective Tissue

In this lesson, you'll learn about the various types of connective tissues in the body. These tissues include bone, fat, cartilage and blood. They form the framework of the body, support organs and much, much more!

Pathogens: Antibiotic Resistance and Virulence

3. 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.

Acquired Immunity: T Cells, B Cells and Antibodies

4. 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.

Flu Viruses, HIV and Immune System Evasion

5. Flu Viruses, HIV and Immune System Evasion

Why is it that our immune systems can protect us from some viruses but not others? We've eradicated smallpox by using vaccines, so why do influenza and HIV remain such dangerous health risks? In this lesson about viruses, we'll explore these questions and learn how influenza and HIV continue to evade the human immune system.

The Structure and Function of Neurons

6. 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.

Brain Structures and Functions Part I

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.

The Cerebral Cortex: Brain Structures and Functions Part II

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.

Innate Immunity: Inflammation, Neutrophils & Natural Killer Cells

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.

Homeostasis and Temperature Regulation in Humans

10. 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.

Homeostasis of Glucose Levels: Hormonal Control and Diabetes

11. 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.

Antibiotics and Vaccines

12. 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.

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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