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

Erythrocytes: Hemoglobin

Anatomy & Physiology

17. The Blood

Erythrocytes: Hemoglobin

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2:34 minutes

Problem 4

Textbook Question

More than one choice may apply.
Polycythemia vera will result in
a. Overproduction of WBCs
b. Exceptionally high blood volume
c. Abnormally high blood viscosity
d. Abnormally low hematocrit

Verified step by step guidance

Understand the condition: Polycythemia vera is a blood disorder characterized by the overproduction of red blood cells (RBCs) by the bone marrow. This can lead to various physiological effects on the blood and circulatory system.

Analyze the options: Evaluate each choice based on the physiological consequences of Polycythemia vera. For example, consider how the overproduction of RBCs affects blood viscosity, hematocrit levels, and other blood components.

Option a: Overproduction of WBCs is not a characteristic of Polycythemia vera. The disorder primarily involves RBCs, not white blood cells.

Option b: Exceptionally high blood volume may occur in Polycythemia vera due to the increased number of RBCs, which can contribute to an overall increase in blood volume.

Option c: Abnormally high blood viscosity is a hallmark of Polycythemia vera. The excessive number of RBCs thickens the blood, making it more viscous and potentially leading to complications like clotting or impaired circulation.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Polycythemia Vera

Polycythemia vera is a myeloproliferative neoplasm characterized by the overproduction of red blood cells (RBCs) due to a mutation in the JAK2 gene. This condition leads to increased blood viscosity and volume, which can result in various complications, including thrombosis. Understanding this disorder is crucial for interpreting its effects on blood components.

Blood Viscosity

Blood viscosity refers to the thickness and stickiness of blood, which is influenced by the number of cells and proteins in the blood. In polycythemia vera, the overproduction of red blood cells increases viscosity, leading to potential complications such as impaired blood flow and increased risk of clotting. Recognizing the implications of high blood viscosity is essential for managing the condition.

Hematocrit

Hematocrit is the proportion of blood volume that is occupied by red blood cells. In polycythemia vera, hematocrit levels are typically elevated due to the increased production of RBCs. Understanding hematocrit is important for diagnosing and monitoring polycythemia vera, as it provides insight into the severity of the condition and its impact on overall health.

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Textbook Question

More than one choice may apply.

If an Rh ⁻ mother becomes pregnant, when can hemolytic disease of the newborn not possibly occur in the child?

a. If the child is Rh ⁻

b. If the child is Rh⁺

c. If the father is Rh⁺

d. If the father is Rh ⁻

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A woman comes to the clinic complaining of fatigue, shortness of breath, and chills. Blood tests show anemia, and a bleeding ulcer is diagnosed. What type of anemia is this?

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Textbook Question

More than one choice may apply.

In a person with sickle cell anemia, sickling of RBCs can be induced by

a. Blood loss

b. Vigorous exercise

c. Stress

d. Fever

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Textbook Question