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 Heart2h 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

Enzymes

Anatomy & Physiology

3. Energy & Cell Processes

Enzymes

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Multiple Choice

Which of the following environments or actions would not affect the rate of an enzyme reaction?

Heating the enzyme

Cooling the enzyme

Substrate concentration

None of the listed responses is correct.

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Verified step by step guidance

Understand that enzymes are biological catalysts that speed up chemical reactions in the body. Their activity can be influenced by several factors including temperature, substrate concentration, and pH.

Consider the effect of temperature: Heating an enzyme generally increases the rate of reaction up to a certain point, as it provides more kinetic energy to the molecules involved. However, excessive heat can denature the enzyme, reducing its activity.

Cooling an enzyme typically slows down the reaction rate because it reduces the kinetic energy available for the reaction, making it less likely for enzyme and substrate molecules to collide effectively.

Examine substrate concentration: Increasing substrate concentration can increase the rate of reaction, as more substrate molecules are available to bind with the enzyme. However, once all enzyme molecules are saturated, further increases in substrate concentration will not affect the rate.

Analyze the effect of pH: Enzymes have an optimal pH range in which they function most effectively. Deviations from this optimal pH can alter the enzyme's structure and function, affecting the rate of reaction.