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

How is increased muscle perfusion during exercise primarily accomplished?

By constriction of capillaries within the muscles

By decreased heart rate

By reduced blood flow to the muscles

By vasodilation of arterioles supplying the muscles

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Verified step by step guidance

Understand the concept of muscle perfusion: Muscle perfusion refers to the delivery of blood to muscle tissues, which is essential for providing oxygen and nutrients during exercise.

Recognize the physiological need during exercise: During physical activity, muscles require increased oxygen and nutrients to sustain their activity. This necessitates an increase in blood flow to the active muscles.

Learn about vasodilation: Vasodilation is the widening of blood vessels, particularly arterioles, which increases blood flow to specific tissues. This process is regulated by signals such as nitric oxide and other vasodilatory substances released during exercise.

Identify the role of arterioles: Arterioles are small blood vessels that control blood flow into capillary beds. During exercise, vasodilation of arterioles supplying the muscles occurs, allowing more blood to reach the muscle tissues.

Eliminate incorrect options: Constriction of capillaries, decreased heart rate, and reduced blood flow to muscles would all decrease perfusion, which is counterproductive during exercise. Vasodilation of arterioles is the correct mechanism for increasing muscle perfusion.