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

Laws of Thermodynamics

Anatomy & Physiology

3. Energy & Cell Processes

Laws of Thermodynamics

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Multiple Choice

If the entropy of a living organism is decreasing, which of the following is most likely to be occurring simultaneously?

The entropy of the organism's environment must also be decreasing.

Heat is being used by the organism as a source of energy.

The first law of thermodynamics is being violated.

In this situation, the second law of thermodynamics must not apply.

Energy input into the organism must be occurring to drive the decrease in entropy.

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Verified step by step guidance

Understand the concept of entropy: Entropy is a measure of disorder or randomness in a system. In biological systems, a decrease in entropy typically means that the organism is becoming more ordered, which requires energy input.

Consider the second law of thermodynamics: This law states that the total entropy of an isolated system can never decrease over time. However, living organisms are not isolated systems; they exchange energy and matter with their environment.

Recognize the need for energy input: For an organism to decrease its entropy, it must receive energy from its environment. This energy is used to maintain order and perform biological functions.

Evaluate the options: The correct answer involves energy input into the organism. The other options either misinterpret thermodynamic laws or incorrectly assume changes in the environment's entropy.

Conclude that energy input is necessary: The decrease in entropy within the organism is driven by energy input, which allows the organism to maintain order and function effectively.