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

What are the folds in the sarcolemma at the neuromuscular junction called?

Z discs

Myofibrils

Motor end plate

T-tubules

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Verified step by step guidance

Understand the anatomy of the neuromuscular junction: The neuromuscular junction is the site where a motor neuron communicates with a muscle fiber to initiate contraction. It includes the axon terminal of the neuron, the synaptic cleft, and the specialized region of the muscle fiber's sarcolemma.

Learn the structure of the sarcolemma at the neuromuscular junction: The sarcolemma is the plasma membrane of a muscle fiber. At the neuromuscular junction, the sarcolemma has specialized folds called the motor end plate. These folds increase the surface area for acetylcholine receptors, which are essential for signal transmission.

Differentiate the terms provided in the question: Z discs are structural components of the sarcomere, not related to the neuromuscular junction. Myofibrils are the contractile units within muscle fibers. T-tubules are invaginations of the sarcolemma that help propagate action potentials deep into the muscle fiber. None of these terms describe the folds at the neuromuscular junction.

Focus on the correct term: The motor end plate is the specialized region of the sarcolemma at the neuromuscular junction. It contains folds that house acetylcholine receptors, facilitating the transmission of signals from the motor neuron to the muscle fiber.

Conclude the explanation: The folds in the sarcolemma at the neuromuscular junction are called the motor end plate. This structure is critical for efficient communication between the nervous system and the muscular system.