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

Chemical Reactions

Anatomy & Physiology

3. Energy & Cell Processes

Chemical Reactions

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Multiple Choice

An exergonic (spontaneous) reaction is a chemical reaction that __________.

occurs only when an enzyme or other catalyst is present

cannot occur outside of a living cell

is common in anabolic pathways

leads to a decrease in the entropy of the universe

releases energy when proceeding in the forward direction

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Verified step by step guidance

Understand the definition of an exergonic reaction: An exergonic reaction is a chemical reaction where the change in the free energy is negative, indicating that energy is released during the reaction.

Recognize that exergonic reactions are spontaneous, meaning they can occur without the input of additional energy.

Consider the role of enzymes: While enzymes can speed up reactions, exergonic reactions do not require them to occur; they simply lower the activation energy.

Analyze the options: An exergonic reaction does not need to occur within a living cell, is not typically associated with anabolic pathways (which are endergonic), and does not decrease the entropy of the universe.

Conclude that the defining characteristic of an exergonic reaction is that it releases energy when proceeding in the forward direction, aligning with the correct answer provided.