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

The minimum stimulus needed to cause muscle contraction is called the __________.

tetanus

refractory period

threshold stimulus

action potential

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Verified step by step guidance

Step 1: Understand the concept of muscle contraction. Muscle contraction occurs when a stimulus triggers the muscle fibers to respond, leading to the shortening of the muscle.

Step 2: Define the term 'threshold stimulus.' The threshold stimulus is the minimum level of stimulus required to depolarize the muscle cell membrane and initiate an action potential, leading to muscle contraction.

Step 3: Differentiate between the given options: 'tetanus' refers to a sustained muscle contraction, 'refractory period' is the time during which a muscle cannot respond to a new stimulus, and 'action potential' is the electrical signal that travels along the muscle fiber.

Step 4: Recognize that the correct term for the minimum stimulus needed to cause muscle contraction is 'threshold stimulus,' as it directly relates to the initiation of muscle contraction.

Step 5: Apply this understanding to similar problems by identifying the key terms and their definitions to ensure accurate answers in Anatomy & Physiology.