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

17. The Blood

Platelets: Hemostasis

Anatomy & Physiology

17. The Blood

Platelets: Hemostasis

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Multiple Choice

Which of the following shows the correct sequence of hemostasis from start to end?

platelet plug formation, vascular spasm, coagulation

coagulation, vascular spasm, platelet plug formation

vascular spasm, coagulation, platelet plug formation

vascular spasm, platelet plug formation, coagulation

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Verified step by step guidance

Understand the concept of hemostasis, which is the process that stops bleeding and involves several key steps to prevent blood loss.

The first step in hemostasis is vascular spasm. This is an immediate response to blood vessel injury, where the blood vessels constrict to reduce blood flow and limit blood loss.

The second step is platelet plug formation. Platelets adhere to the site of injury and to each other, forming a temporary 'plug' that covers the break in the vessel wall.

The final step is coagulation, also known as blood clotting. This involves a cascade of reactions that lead to the transformation of fibrinogen into fibrin, which stabilizes the platelet plug and forms a more permanent clot.

By understanding these steps, you can identify the correct sequence of hemostasis as: vascular spasm, platelet plug formation, coagulation.