Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 39m
3. Energy & Cell Processes10h 8m
4. Tissues & Histology10h 3m
5. Integumentary System2h 28m
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 System3h 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

9. Muscle Tissue

Steps of Muscle Contraction

Anatomy & Physiology

9. Muscle Tissue

Steps of Muscle Contraction

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Multiple Choice

Each skeletal muscle fiber is controlled by a neuron at a single __________.

varicosity

neuromuscular junction

synaptic knob

transverse tubule

sarcomere

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Verified step by step guidance

Understand the context: Skeletal muscle fibers are controlled by neurons, which communicate with the muscle fibers to initiate contraction.

Identify the key term: The point where a neuron communicates with a muscle fiber is crucial for transmitting signals.

Define the term 'neuromuscular junction': This is the specific site where the motor neuron and muscle fiber meet, allowing for the transmission of nerve impulses to the muscle.

Differentiate between the options: A 'varicosity' is related to autonomic nervous system and smooth muscle, not skeletal muscle. A 'synaptic knob' is part of the neuron but not the specific site of communication with muscle fibers. A 'transverse tubule' is involved in conducting electrical signals within the muscle fiber, not the site of neuron-muscle communication. A 'sarcomere' is the functional unit of muscle contraction, not the site of neural control.

Conclude with the correct term: The 'neuromuscular junction' is the correct term for the site where a neuron controls a skeletal muscle fiber.