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 Heart2h 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

Cell Junctions

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Cell Junctions

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Multiple Choice

Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through:

Gap junctions.

Desmosomes.

Tight junctions.

Intermediate filaments.

Plasmodesmata.

Actin filaments.

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Verified step by step guidance

Understand the function of gap junctions: Gap junctions are specialized intercellular connections that facilitate direct communication between the cytoplasm of adjacent animal cells. They allow ions and small molecules to pass freely between cells, enabling synchronized activity.

Differentiate between the types of cell junctions: Desmosomes provide mechanical strength by anchoring cells together, tight junctions create a seal to prevent leakage between cells, and intermediate filaments are part of the cytoskeleton providing structural support.

Recognize that plasmodesmata are specific to plant cells: Plasmodesmata are channels that allow communication between plant cells, not animal cells.

Identify the role of actin filaments: Actin filaments are part of the cytoskeleton involved in cell movement and shape, not direct intercellular communication.

Conclude that gap junctions are the correct answer for direct ion travel between animal cells: Given the options, gap junctions are the only structure that facilitates direct cytoplasmic communication between adjacent animal cells.