Purpose

In this activity you will learn more about cellular respiration, and in particular, about the citric acid cycle.

Introduction

Normally when we think of metabolism, we think of weight loss fads like the Keto diet, the Paleo diet or intermittent fasting. Metabolism, however, is way more interesting than weight loss trends. It is the process used by your body to transform Cap’n Crunch into brain cells, and some scientists believe it his has huge implication for the origin of life! In this animation we take a look at the citric acid cycle (sometimes called the Krebs Cycle or the tricarboxylic acid cycle), and the reverse citric acid cycle.

Cellular respiration is the cell's way of using glucose from food to make energy in the form of ATP. There are many metabolic pathways that a cell can rely on for energy. Collectively, these metabolic pathways make up cellular respiration. Consisting of a series of chemical reactions that primarily operate under aerobic conditions (those requiring air or oxygen), cellular respiration includes glycolysis, the citric acid cycle, an electron transport chain, and chemiosmosis. When cells are deprived of oxygen, they can still get energy using a different process called fermentation.

The videos below will discuss these ideas further. Please watch the videos and then follow the instructions below.

Instructions

As you watch the following videos, take notes on anything you find interesting and helpful in expanding your understanding of cellular respiration. Add your notes to your Evidence Notebook.
- What is Metabolism from Stated Clearly
- Cellular Respiration, Glycolysis, Krebs Cycle, Electron Transport
- Three videos from the lecture series of Jessica Pamment, Ph.D. of Department of Biological Sciences DePaul University:
  - What is Cellular Respiration?
  - Glycolysis
  - The Citric Acid Cycle
Answer the following question for activity 3.2.2 in your Lesson 3.2 Worksheet:
1. After watching the above videos, arrange these five resources in order from most relevant to least relevant, following each with a sentence about their relevance and/or helpfulness to you. Make sure that you account for content found in each of the resources.

Worksheet Guidelines

Add your notes to your Evidence Notebook.
Answer the above questions for activity 3.2.2 in your Lesson 3.2 Worksheet.
Be sure to save your worksheet. Click NEXT below to go to the next Activity.

Assignment Resources

What is Metabolism?
-“What is Metabolism?.” YouTube, Stated Clearly, https://www.youtube.com/watch?v=nRq6N5NGD1U
Cellular Respiration, Glycolysis, Krebs Cycle, Electron Transport
-“Cellular Respiration Glycolysis, Krebs cycle, Electron Transport 3D Animation YouTube 720p.” YouTube, Bodlao Foundation, https://youtu.be/pNzFYBA2Ofg
What is Cellular Respiration?
-“What Is Cellular Respiration? | Biology.” YouTube,
Course Hero, https://www.youtube.com/watch?v=JDPtU8bcghQ&t=7s
Glycolysis
-“Glycolysis | Biology.” YouTube, Course Hero, https://www.youtube.com/watch?v=Z5ZkdtS6z2E
The Citric Acid Cycle
-“The Citric Acid Cycle | Biology.” YouTube, Course Hero, https://www.youtube.com/watch?v=E9jOPUSg-As&t=1s