Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Review of Aerobic Cellular Respiration

Anatomy & Physiology

3. Energy & Cell Processes

Review of Aerobic Cellular Respiration

Previous problemNext problem

Problem 7

Textbook Question

Most CO2 from catabolism is released duringa. glycolysis.b. the citric acid cycle.c. lactate fermentation.d. electron transport.

Verified step by step guidance

Identify the main stages of cellular respiration: glycolysis, the citric acid cycle (Krebs cycle), and the electron transport chain.

Understand that glycolysis occurs in the cytoplasm and primarily breaks down glucose into pyruvate, producing a small amount of ATP and NADH, but not releasing CO2.

Recognize that the citric acid cycle takes place in the mitochondria, where acetyl-CoA is oxidized, leading to the release of CO2 as a byproduct.

Note that lactate fermentation is an anaerobic process that converts pyruvate into lactate, primarily in muscle cells, without releasing CO2.

Acknowledge that the electron transport chain involves the transfer of electrons through a series of proteins in the mitochondrial membrane, ultimately producing water and ATP, but not directly releasing CO2.

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Catabolism

Catabolism is the metabolic process that breaks down molecules to obtain energy. It involves the degradation of complex molecules into simpler ones, releasing energy stored in chemical bonds. This process is crucial for cellular respiration, where nutrients are converted into usable energy, primarily in the form of ATP.

Citric Acid Cycle

The citric acid cycle, also known as the Krebs cycle, is a key metabolic pathway that occurs in the mitochondria. It processes acetyl-CoA derived from carbohydrates, fats, and proteins, producing CO2, ATP, and electron carriers (NADH and FADH2). Most CO2 produced during cellular respiration is released in this cycle, making it central to understanding energy metabolism.

Glycolysis

Glycolysis is the initial stage of glucose catabolism, occurring in the cytoplasm, where one glucose molecule is broken down into two molecules of pyruvate. This process generates a small amount of ATP and NADH but does not produce CO2. Understanding glycolysis is essential for grasping how glucose is utilized before entering the citric acid cycle.