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

Long bones enable body movement by acting as a ________.

hinge

lever

pulley

spring

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Verified step by step guidance

Step 1: Understand the function of long bones in the skeletal system. Long bones, such as the femur and humerus, are designed to support weight and facilitate movement by acting as mechanical structures.

Step 2: Recall the concept of a lever in biomechanics. A lever is a rigid structure (like a bone) that rotates around a fixed point called a fulcrum (such as a joint). Levers amplify force to enable movement.

Step 3: Compare the options provided in the question. A hinge refers to a type of joint, not the function of the bone itself. A pulley and spring are mechanical devices that do not describe the role of long bones in movement.

Step 4: Recognize that long bones act as levers in the body. Muscles apply force to the bones, which pivot around joints (fulcrums) to produce movement.

Step 5: Conclude that the correct answer is 'lever,' as it accurately describes the role of long bones in enabling body movement.