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 statements correctly describes the role of platelets in hemostasis?

Platelets produce antibodies to fight infections.

Platelets dissolve blood clots after healing.

Platelets release chemicals that initiate the clotting process.

Platelets are responsible for transporting oxygen in the blood.

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Verified step by step guidance

Understand the role of platelets in the body: Platelets, also known as thrombocytes, are small cell fragments in the blood that are crucial for blood clotting and wound healing.

Identify the primary function of platelets in hemostasis: Hemostasis is the process that stops bleeding at the site of an injury. Platelets play a key role by adhering to the site of a blood vessel injury, forming a temporary plug.

Recognize the chemical release by platelets: When platelets adhere to the injury site, they release chemicals such as ADP, thromboxane A2, and serotonin, which help to recruit more platelets and initiate the clotting cascade.

Differentiate between the options: Platelets do not produce antibodies, dissolve clots, or transport oxygen. Their main function in hemostasis is to release chemicals that initiate the clotting process.

Conclude with the correct statement: The correct description of the role of platelets in hemostasis is that they release chemicals that initiate the clotting process.