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

Origin and Insertion

Anatomy & Physiology

10. Muscles

Origin and Insertion

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3:04 minutes

Problem 4

Textbook Question

Levers make action more versatile by all of the following, except
(a) Changing the location of the muscle's insertion
(b) Changing the speed of movement produced by an applied force
(c) Changing the distance of movement produced by an applied force
(d) Changing the strength of an applied force
(e) Changing the direction of an applied force

Verified step by step guidance

Step 1: Begin by understanding the concept of levers in the human body. Levers are rigid structures (like bones) that rotate around a fixed point called the fulcrum (e.g., joints). They are used to amplify force, change direction, or modify the speed and distance of movement.

Step 2: Review the functions of levers in biomechanics. Levers can change the speed of movement, the distance of movement, the direction of force, and the strength of an applied force. These functions are essential for efficient movement and force application in the body.

Step 3: Analyze each option provided in the question. Determine whether each option aligns with the known functions of levers. For example, levers can change the speed of movement (option b), the distance of movement (option c), the direction of force (option e), and the strength of an applied force (option d).

Step 4: Evaluate option (a), which states 'changing the location of the muscle's insertion.' Consider whether levers directly affect the anatomical location of muscle insertion points. Muscle insertion points are determined by anatomy and do not change due to lever mechanics.

Step 5: Conclude that the correct answer is the option that does not align with the functions of levers. Based on the analysis, levers do not change the location of the muscle's insertion, making option (a) the correct choice.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Levers and Mechanical Advantage

Levers are simple machines that amplify an applied force to produce movement. They consist of a fulcrum, effort, and load, allowing for mechanical advantage, which means that a smaller force can be used to move a larger load. Understanding how levers function is crucial for analyzing their effects on movement and force.

Types of Levers

There are three classes of levers: first-class, second-class, and third-class, each defined by the relative positions of the fulcrum, effort, and load. First-class levers can change the direction of force, second-class levers provide a mechanical advantage in strength, and third-class levers increase the speed and distance of movement. Recognizing these types helps in understanding their specific applications in biomechanics.

Force and Motion

The relationship between force and motion is fundamental in physics, particularly in biomechanics. Force can change the speed, direction, and distance of an object's movement. In the context of levers, understanding how force is applied and transformed is essential for evaluating the effectiveness of different lever configurations in producing movement.

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