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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Each skeletal muscle fiber is controlled by a motor neuron at a single:

intercalated disc

neuromuscular junction

sarcomere

myofibril

Previous problemNext problem

Verified step by step guidance

Understand the anatomy of a skeletal muscle fiber: Skeletal muscle fibers are long, cylindrical cells that contract to produce movement. Each fiber is controlled by a motor neuron, which sends signals to initiate contraction.

Learn the role of the neuromuscular junction: The neuromuscular junction is the specialized synapse where the motor neuron communicates with the skeletal muscle fiber. It is the site where neurotransmitters like acetylcholine are released to trigger muscle contraction.

Clarify why intercalated discs are not the correct answer: Intercalated discs are structures found in cardiac muscle, not skeletal muscle. They help connect cardiac muscle cells and facilitate synchronized contraction, but they are unrelated to motor neuron control of skeletal muscle fibers.

Understand why sarcomeres and myofibrils are not the correct answer: Sarcomeres are the functional units of muscle contraction within myofibrils, and myofibrils are bundles of protein filaments within muscle fibers. While they are essential for contraction, they are not the site where motor neurons control muscle fibers.

Conclude that the neuromuscular junction is the correct answer: The neuromuscular junction is the only structure listed that directly facilitates communication between a motor neuron and a skeletal muscle fiber, making it the correct answer.