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

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

Which of the following is a likely effect of having increased muscle mass?

Decreased bone density

Higher basal metabolic rate

Reduced strength

Lower energy expenditure at rest

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Verified step by step guidance

Step 1: Understand the relationship between muscle mass and basal metabolic rate (BMR). Muscle tissue is metabolically active, meaning it requires energy to maintain itself even at rest. Increased muscle mass leads to a higher BMR because more energy is needed to sustain the additional muscle tissue.

Step 2: Analyze the options provided. 'Decreased bone density' is unlikely because increased muscle mass often correlates with improved bone density due to the mechanical stress muscles exert on bones during physical activity. This stress stimulates bone remodeling and strengthening.

Step 3: Evaluate 'Reduced strength.' Increased muscle mass typically results in greater strength, not reduced strength, as muscle fibers grow larger and stronger with hypertrophy.

Step 4: Consider 'Lower energy expenditure at rest.' This is incorrect because increased muscle mass raises energy expenditure at rest due to the higher metabolic activity of muscle tissue.

Step 5: Conclude that the correct answer is 'Higher basal metabolic rate,' as it aligns with the physiological effects of increased muscle mass, which boosts the body's energy requirements even when at rest.