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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

According to the second law of thermodynamics, which of the following is true?

Energy conversions increase the order in the universe.

The total amount of energy in the universe is constant.

The entropy of the universe is constantly decreasing.

All reactions produce some heat.

The decrease in entropy associated with life must be compensated for by increased entropy in the environment in which life exists.

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Verified step by step guidance

Understand the second law of thermodynamics, which states that the entropy of an isolated system always increases over time. Entropy is a measure of disorder or randomness.

Recognize that energy conversions in biological systems are not 100% efficient, and some energy is always lost as heat, contributing to increased entropy.

Consider the statement 'The total amount of energy in the universe is constant.' This aligns with the first law of thermodynamics, which is the law of conservation of energy, not the second law.

Evaluate the statement 'The entropy of the universe is constantly decreasing.' This contradicts the second law, as entropy tends to increase.

Understand that life forms maintain order and decrease entropy locally, but this decrease is offset by an increase in entropy in the surrounding environment, consistent with the second law.