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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

17. The Blood

Platelets: Hemostasis

Anatomy & Physiology

17. The Blood

Platelets: Hemostasis

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Multiple Choice

What step is critical to the formation of a blood clot during hemostasis?

Vasodilation of blood vessels

Release of oxygen from red blood cells

Production of white blood cells

Platelet adhesion to the site of injury

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Verified step by step guidance

Understand the process of hemostasis, which is the body's response to stop bleeding and involves several key steps: vascular spasm, platelet plug formation, and coagulation.

Recognize that platelet adhesion is a critical step in the formation of a blood clot. This occurs when platelets adhere to the exposed collagen fibers at the site of a blood vessel injury.

Platelet adhesion is followed by platelet activation, where the adhered platelets release chemical signals to recruit more platelets to the site, forming a temporary 'platelet plug.'

The platelet plug is then stabilized by the process of coagulation, where fibrin threads form a mesh that traps blood cells and solidifies the clot.

Identify that the other options (vasodilation, release of oxygen, and production of white blood cells) are not directly involved in the immediate process of blood clot formation during hemostasis.