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

9. Muscle Tissue

Structure of a Skeletal Muscle

Anatomy & Physiology

9. Muscle Tissue

Structure of a Skeletal Muscle

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Multiple Choice

What is the primary function of T-tubules in muscle cells?

To conduct electrical impulses into the muscle fiber

To provide structural support to the muscle fiber

To store calcium ions for muscle contraction

To synthesize ATP for muscle energy

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Verified step by step guidance

Understand the structure of muscle cells: Muscle cells, or muscle fibers, have specialized structures that facilitate contraction. One of these structures is the T-tubule, which is an invagination of the cell membrane.

Learn about the role of T-tubules: T-tubules are responsible for conducting electrical impulses from the surface of the muscle cell deep into the cell's interior. This ensures that the signal for contraction reaches all parts of the muscle fiber simultaneously.

Consider the process of muscle contraction: When a muscle cell receives a signal to contract, it involves the release of calcium ions from the sarcoplasmic reticulum. T-tubules help propagate the electrical signal that triggers this release.

Differentiate between the functions of various muscle cell components: While T-tubules conduct electrical impulses, other structures like the sarcoplasmic reticulum store calcium ions, and mitochondria are involved in ATP synthesis.

Review the options provided: The primary function of T-tubules is to conduct electrical impulses into the muscle fiber, which is crucial for synchronized muscle contraction.