Ch 8: AP Biology: Requirements of Biological Systems

About This Chapter

Watch online science video lessons and learn about free energy, dynamic homeostasis, feedback systems and more. These lessons are just a portion of our AP Biology exam prep course.

AP Biology: Requirements of Biological Systems - Chapter Summary and Learning Objectives

Let our instructors walk you through the basic requirements of biological systems. Video lessons and quizzes can help you explore some of the cellular functions that allow organisms to grow and reproduce, from the conversion of the sun's rays into chemical energy to the process of decay that allows matter to be reused by living organisms. By the end of this chapter, you should be able to:

  • Explain cycles of energy capture and exchange
  • Identify methods by which cells regulate their internal environments
  • Describe the role of feedback mechanisms in maintaining homeostasis

Video Objectives
Living Systems Requirement for Free Energy and Matter Explain why free energy and matter are essential to the growth of living systems. Learn how this energy is captured, stored and exchanged.
The Environmental Requirements for Growth, Reproduction & Dynamic Homeostasis Describe how growth, reproduction and homeostasis require that cells create and maintain internal environments. Find out how cell membranes maintain homeostasis through the active and passive transport of molecules in and out of the cell.
Using Feedback Systems to Regulate Growth, Reproduction & Dynamic Homeostasis Explore how organisms use positive and negative feedback systems to regulate the homeostasis essential for growth and reproduction. Discover examples of alterations that occur when feedback mechanisms malfunction.

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.
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