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

Which of the following is a characteristic of cardiac muscle cells?

They are multinucleated and voluntary.

They are attached to bones and responsible for body movement.

They are striated and have intercalated discs.

They lack striations and are spindle-shaped.

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Verified step by step guidance

Understand the characteristics of cardiac muscle cells: Cardiac muscle cells are specialized muscle cells found in the heart. They are responsible for pumping blood throughout the body and have unique structural features.

Recall the structural features of cardiac muscle cells: Cardiac muscle cells are striated, meaning they have a striped appearance under a microscope due to the arrangement of actin and myosin filaments. They also contain intercalated discs, which are specialized junctions that connect adjacent cardiac muscle cells.

Compare cardiac muscle cells to other muscle types: Skeletal muscle cells are multinucleated and voluntary, while cardiac muscle cells are involuntary and typically have a single nucleus. Smooth muscle cells lack striations and are spindle-shaped, unlike cardiac muscle cells.

Focus on the correct answer: The presence of striations and intercalated discs is a defining characteristic of cardiac muscle cells. Intercalated discs allow for synchronized contraction of the heart by facilitating electrical and mechanical connections between cells.

Eliminate incorrect options: Cardiac muscle cells are not multinucleated and voluntary (skeletal muscle), nor are they attached to bones for body movement. They also do not lack striations or have a spindle shape (smooth muscle).