What This Document Is
These are class notes from Physiology of Exercise (EXS 340) at Grand Canyon University, covering topics related to bioenergetics and biological work, specifically from Chapter 5 and the beginning of Chapter 6. The notes were taken during lectures on January 6th and January 11th, 2023. They focus on the fundamental principles governing energy transfer in living systems and how these principles apply to human movement and exercise.
Why This Document Matters
This study guide is valuable for students enrolled in EXS 340 who are preparing for quizzes or exams on bioenergetics. It’s particularly useful for understanding the theoretical underpinnings of how the body utilizes energy during physical activity. It serves as a condensed record of key lecture points, including concepts like the laws of thermodynamics, endergonic and exergonic reactions, and the different systems involved in ATP resynthesis. It’s best used *during* study, to reinforce lecture material, and *before* attempting practice problems.
Common Limitations or Challenges
These notes are a record of lectures and do not represent a comprehensive textbook. They require accompanying textbook readings and further study to fully grasp the concepts. The notes also contain example calculations, but do not provide detailed step-by-step instructions on *how* to solve similar problems. This document is a supplement to, not a replacement for, active learning and engagement with the course material.
What This Document Provides
This preview includes notes on:
* The first and second laws of thermodynamics and their relevance to biological systems.
* The distinction between endergonic and exergonic reactions.
* An overview of photosynthesis and respiration.
* The three types of biological work (chemical, mechanical, and transport).
* Example calculations of work and power.
* The role of enzymes and coenzymes in energy transfer.
* An introduction to ATP production and the phosphagen, adenylate kinase, and glycolytic systems.
This preview *does not* include a complete explanation of oxidative phosphorylation, detailed coverage of the citric acid cycle, or a full discussion of the regulation of glycolysis. It also does not contain practice problems with solutions.