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

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

Approximately how many skeletal muscles are found in the human body, and how do opposing groups of muscles (antagonistic pairs) function?

There are about 200 skeletal muscles, and antagonistic pairs contract simultaneously to create movement.

There are about 650 skeletal muscles, and antagonistic pairs work by one muscle contracting while the other relaxes to produce movement.

There are about 50 skeletal muscles, and antagonistic pairs function independently without coordination.

There are over 1,500 skeletal muscles, and antagonistic pairs both relax to allow movement.

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Verified step by step guidance

Step 1: Begin by understanding the approximate number of skeletal muscles in the human body. Research and confirm that the human body contains around 650 skeletal muscles, which are responsible for voluntary movements.

Step 2: Learn the concept of antagonistic muscle pairs. These are groups of muscles that work in opposition to each other to produce movement. For example, the biceps and triceps in the arm are antagonistic pairs.

Step 3: Understand the mechanism of antagonistic pairs. When one muscle in the pair contracts (shortens), the opposing muscle relaxes (lengthens). This coordinated action allows for smooth and controlled movement.

Step 4: Review examples of antagonistic pairs in the body, such as the quadriceps and hamstrings in the leg, which work together to facilitate movements like bending and straightening the knee.

Step 5: Clarify misconceptions. Antagonistic pairs do not contract simultaneously to create movement, nor do they function independently without coordination. Their coordinated contraction and relaxation are essential for proper movement.