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

A skeletal muscle twitch differs from a tetanic contraction in that ________.

a twitch occurs only in cardiac muscle, while tetanic contraction occurs in skeletal muscle

a twitch is a single, brief contraction followed by relaxation, while a tetanic contraction is a sustained, continuous contraction

a twitch involves multiple action potentials, while a tetanic contraction involves only one

a twitch requires more ATP than a tetanic contraction

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Verified step by step guidance

Understand the definitions of a muscle twitch and tetanic contraction: A muscle twitch is a single, brief contraction followed by relaxation, typically resulting from a single action potential. A tetanic contraction, on the other hand, is a sustained, continuous contraction caused by repeated stimulation at a high frequency.

Analyze the options provided in the problem: Carefully read each option and compare it to the definitions of muscle twitch and tetanic contraction.

Eliminate incorrect options: For example, the statement 'a twitch occurs only in cardiac muscle, while tetanic contraction occurs in skeletal muscle' is incorrect because both muscle twitch and tetanic contraction occur in skeletal muscle, not cardiac muscle.

Focus on the correct explanation: The correct answer should align with the physiological mechanism of a twitch being a single contraction followed by relaxation, while tetanic contraction is sustained due to repeated stimulation.

Confirm the correct answer: The correct answer is 'a twitch is a single, brief contraction followed by relaxation, while a tetanic contraction is a sustained, continuous contraction,' as this matches the physiological definitions and mechanisms of these muscle responses.