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 Nervous Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Nervous Tissue

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Multiple Choice

In an isotonic contraction, the muscle ________.

relaxes completely after a brief contraction

does not generate any force

remains the same length while the tension increases

changes length while the tension remains constant

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Verified step by step guidance

Step 1: Begin by understanding the concept of isotonic contraction. Isotonic contractions occur when a muscle changes its length while maintaining constant tension. This is different from isometric contractions, where the muscle length remains the same while tension increases.

Step 2: Break down the options provided in the problem. Analyze each one to determine if it aligns with the definition of isotonic contraction.

Step 3: Evaluate the first option: 'relaxes completely after a brief contraction.' This does not describe isotonic contraction, as isotonic contraction involves sustained tension while the muscle changes length.

Step 4: Evaluate the second option: 'does not generate any force.' This is incorrect because isotonic contractions involve force generation to move or resist a load.

Step 5: Evaluate the third and fourth options. The third option, 'remains the same length while the tension increases,' describes isometric contraction, not isotonic contraction. The fourth option, 'changes length while the tension remains constant,' matches the definition of isotonic contraction and is the correct answer.