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

During which of the following types of muscle contractions does a muscle lengthen as it contracts?

Tetanic contraction

Concentric contraction

Isometric contraction

Eccentric contraction

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Verified step by step guidance

Step 1: Begin by understanding the different types of muscle contractions. Muscle contractions are categorized based on how the muscle changes in length and the type of force it generates.

Step 2: Define each type of contraction: - Tetanic contraction: A sustained contraction resulting from rapid, repeated stimulation of the muscle. - Concentric contraction: The muscle shortens as it generates force. - Isometric contraction: The muscle generates force without changing its length. - Eccentric contraction: The muscle lengthens while generating force.

Step 3: Focus on the eccentric contraction. This type of contraction occurs when the muscle is actively resisting a force while being stretched. For example, during the lowering phase of a bicep curl, the biceps muscle lengthens as it contracts to control the descent of the weight.

Step 4: Compare the eccentric contraction to the other types listed in the problem. None of the other types involve the muscle lengthening as it contracts. Tetanic contraction involves sustained force, concentric contraction involves shortening, and isometric contraction involves no change in length.

Step 5: Conclude that the correct answer is eccentric contraction, as it is the only type of contraction where the muscle lengthens while generating force.