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

17. The Blood

Platelets: Hemostasis

Anatomy & Physiology

17. The Blood

Platelets: Hemostasis

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Multiple Choice

Which of the following statements about platelets is INCORRECT?

The life span of platelets is between 30 and 60 days.

Platelets are essential for the clotting process.

Platelets contain serotonin, ADP, calcium, and PDGF.

Platelets are fragments of a larger cell called a megakaryocyte.

The formation of platelets is regulated by the hormone thrombopoietin.

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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 that play a crucial role in blood clotting and wound healing.

Review the lifespan of platelets: Typically, platelets have a lifespan of about 7 to 10 days, not 30 to 60 days. This is a key point to identify the incorrect statement.

Examine the components contained in platelets: Platelets contain various substances such as serotonin, ADP (adenosine diphosphate), calcium, and PDGF (platelet-derived growth factor), which are important for their function in clotting.

Identify the origin of platelets: Platelets are derived from larger cells called megakaryocytes, which reside in the bone marrow. These megakaryocytes release small fragments that become platelets.

Understand the regulation of platelet formation: The hormone thrombopoietin regulates the production of platelets by stimulating the production of megakaryocytes in the bone marrow.