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

2. Cell Chemistry & Cell Components

Introduction to Eukaryotic Organelles

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Eukaryotic Organelles

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Multiple Choice

Which of the following is NOT a distinct feature of intercalated discs in cardiac muscle cells?

Desmosomes that provide strong mechanical attachment between cells

Fascia adherens that anchor actin filaments and transmit contractile force

Gap junctions that allow for electrical coupling between cells

Tight junctions that prevent passage of ions between cells

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Verified step by step guidance

Step 1: Understand the structure and function of intercalated discs in cardiac muscle cells. Intercalated discs are specialized connections between cardiac muscle cells that facilitate synchronized contraction and communication.

Step 2: Review the three distinct features of intercalated discs: (1) Desmosomes, which provide strong mechanical attachment between cells, preventing them from pulling apart during contraction; (2) Fascia adherens, which anchor actin filaments and transmit contractile force between cells; and (3) Gap junctions, which allow for electrical coupling and ion passage, enabling rapid communication between cells.

Step 3: Analyze the provided options. Tight junctions are not a feature of intercalated discs. Tight junctions are typically found in epithelial cells and serve to prevent the passage of ions and molecules between cells, which is not the function of intercalated discs in cardiac muscle.

Step 4: Compare the correct answer (Tight junctions) with the other options. Desmosomes, fascia adherens, and gap junctions are all essential components of intercalated discs, while tight junctions are unrelated to cardiac muscle cell communication or contraction.

Step 5: Conclude that the correct answer is Tight junctions, as they do not contribute to the structural or functional properties of intercalated discs in cardiac muscle cells.