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

4. Tissues & Histology

Introduction to Muscle Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Muscle Tissue

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Multiple Choice

Which two concepts are fundamental to explaining how the body moves?

Muscle contraction and the sliding filament theory

Osmosis and diffusion

Cell division and mitosis

Homeostasis and negative feedback

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Verified step by step guidance

Understand the context of the question: The problem is asking about fundamental concepts that explain how the body moves, which is related to the musculoskeletal system and physiology of movement.

Review the concept of muscle contraction: Muscle contraction is the process by which muscle fibers generate tension and shorten, enabling movement. This involves the interaction of actin and myosin filaments within the sarcomere, the functional unit of a muscle.

Learn about the sliding filament theory: The sliding filament theory explains how muscle contraction occurs at the molecular level. It describes how myosin heads bind to actin filaments and pull them inward, causing the sarcomere to shorten and the muscle to contract.

Evaluate the other options: Osmosis and diffusion are processes related to the movement of substances across membranes, not directly related to body movement. Cell division and mitosis are processes of cellular replication, and homeostasis and negative feedback are mechanisms for maintaining internal balance, none of which directly explain body movement.

Conclude that muscle contraction and the sliding filament theory are the correct concepts because they directly describe the physiological mechanisms behind how the body moves.