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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Problem 1

Textbook Question

Which of the following is not a formed element of blood?
a. Erythrocyte
b. Leukocyte
c. Mast cell
d. Platelet

Verified step by step guidance

Step 1: Understand the term 'formed elements of blood.' Formed elements refer to the cellular components of blood, which include erythrocytes (red blood cells), leukocytes (white blood cells), and platelets (cell fragments). These are suspended in plasma.

Step 2: Review the function and classification of erythrocytes. Erythrocytes are responsible for oxygen transport and are a major formed element of blood.

Step 3: Examine leukocytes. Leukocytes are white blood cells involved in immune defense and are also considered formed elements of blood.

Step 4: Analyze platelets. Platelets are small cell fragments that play a critical role in blood clotting and are classified as formed elements of blood.

Step 5: Consider mast cells. Mast cells are part of the immune system but are not found as formed elements in circulating blood. They are primarily located in tissues and play a role in allergic responses, making them the correct answer to the question.

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Key Concepts

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

Formed Elements of Blood

Formed elements of blood refer to the cellular components that are suspended in the plasma. These include erythrocytes (red blood cells), leukocytes (white blood cells), and platelets. Each of these elements plays a crucial role in bodily functions, such as oxygen transport, immune response, and blood clotting.

Erythrocytes

Erythrocytes, or red blood cells, are the most abundant formed elements in blood. Their primary function is to transport oxygen from the lungs to the body's tissues and return carbon dioxide from the tissues back to the lungs. They contain hemoglobin, a protein that binds oxygen, making them essential for respiration.

Leukocytes

Leukocytes, or white blood cells, are a key component of the immune system. They help the body fight infections and other diseases by identifying and destroying pathogens. There are several types of leukocytes, each with specific functions, including neutrophils, lymphocytes, and monocytes.

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Related Practice

Textbook Question

The waste product bilirubin is formed from:

(a) Transferrin

(b) Globin

(d) Hemosiderin

(e) Ferritin

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Textbook Question

Discuss hemoglobin relative to its chemical structure, its function, and the color changes it undergoes during loading and unloading of oxygen.

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Textbook Question

A middle-aged college professor from Boston is in the Swiss Alps studying astronomy. He arrived two days ago and plans to stay the entire year. However, he notices that he is short of breath when he walks up steps and that he tires easily with any physical activity. His symptoms gradually disappear; after two months, he feels fine. Upon returning to the United States, he has a complete physical exam and is told that his erythrocyte count is higher than normal.

(a) Attempt to explain this finding.

(b) Will his RBC count remain at this higher-than-normal level? Why or why not?

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Textbook Question

Relate the structure of hemoglobin to its function.

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Textbook Question

Which of the following plasma proteins is responsible for osmotic pressure?

a. γ-Globulins

b. Albumin