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

Which structure in the muscle cell stores calcium?

Sarcoplasmic reticulum

Nucleus

Golgi apparatus

Mitochondria

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Verified step by step guidance

Understand the role of calcium in muscle contraction: Calcium ions are crucial for muscle contraction as they bind to troponin, allowing actin and myosin to interact.

Identify the organelle responsible for storing calcium in muscle cells: The sarcoplasmic reticulum is a specialized form of the endoplasmic reticulum in muscle cells that stores and releases calcium ions.

Differentiate between the given options: The nucleus is involved in genetic material storage, the Golgi apparatus is involved in protein processing and packaging, and mitochondria are responsible for energy production.

Recognize the function of the sarcoplasmic reticulum: It regulates calcium ion concentration in the cytoplasm of muscle cells, which is essential for muscle contraction and relaxation.

Conclude that the sarcoplasmic reticulum is the correct structure that stores calcium in muscle cells, based on its specific role in calcium ion storage and release.