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 about hematocrit levels is true?

Hematocrit levels are unrelated to red blood cell count.

A low hematocrit level is a sign of dehydration.

A high hematocrit level suggests anemia.

A normal hematocrit level indicates a balanced proportion of red blood cells in the blood.

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Verified step by step guidance

Understand the definition of hematocrit: Hematocrit is the percentage of red blood cells (RBCs) in the total blood volume. It is a crucial indicator of the blood's ability to carry oxygen.

Analyze the relationship between hematocrit levels and red blood cell count: Hematocrit levels are directly related to the number of red blood cells. A higher RBC count typically results in a higher hematocrit level.

Evaluate the statement about dehydration: Dehydration often leads to a higher hematocrit level because the plasma volume decreases, concentrating the red blood cells.

Consider the statement about anemia: Anemia is characterized by a low hematocrit level due to a reduced number of red blood cells or hemoglobin, not a high hematocrit level.

Identify the correct statement: A normal hematocrit level indicates a balanced proportion of red blood cells in the blood, which is essential for proper oxygen transport and overall health.