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

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Multiple Choice

Which of the following statements correctly describes blood platelets?

They are the most abundant type of white blood cell.

They produce antibodies to fight infections.

They transport oxygen from the lungs to body tissues.

They are cell fragments involved in blood clotting.

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Verified step by step guidance

Understand the role of blood platelets: Blood platelets, also known as thrombocytes, are small cell fragments in the blood that play a crucial role in the clotting process. They are not full cells but fragments derived from larger cells called megakaryocytes.

Eliminate incorrect options: Review the provided statements and eliminate those that do not align with the known functions of blood platelets. For example, platelets are not white blood cells, so the statement 'They are the most abundant type of white blood cell' is incorrect.

Clarify the function of antibodies: Antibodies are produced by B lymphocytes (a type of white blood cell) to fight infections. Platelets do not produce antibodies, so the statement 'They produce antibodies to fight infections' is incorrect.

Understand oxygen transport: Oxygen transport is the primary function of red blood cells, not platelets. Hemoglobin within red blood cells binds oxygen and carries it to body tissues. Therefore, the statement 'They transport oxygen from the lungs to body tissues' is incorrect.

Confirm the correct statement: Blood platelets are involved in blood clotting. They aggregate at the site of a blood vessel injury, release clotting factors, and help form a plug to prevent further bleeding. The correct answer is: 'They are cell fragments involved in blood clotting.'