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Ch. 19 Blood
All textbooksErin C. Amerman 2nd EditionCh. 19 BloodProblem 1
Chapter 19, Problem 1

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
1
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.
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Composition of Blood

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.
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Structure of Erythrocytes

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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Leukocytes Example 1
Related Practice
Textbook Question

Elise is a 36-year-old woman who has volunteered to donate red bone marrow to a patient in need of a bone marrow transplant for aplastic anemia. The physician performing the bone marrow extraction is an intern, and it is her first time doing the procedure. She asks that you prepare a site on Elise's tibia for the procedure. Is this a good place for red bone marrow to be extracted, considering Elise's age? Why or why not? Can you suggest an alternative location? Explain.

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Textbook Question

Cirrhosis of the liver often reduces production of many types of plasma proteins, including albumin and clotting factors. Predict the effects on the body of decreased numbers of these proteins in the plasma. Would this also affect the number of γ-globulins in the plasma? Why or why not?

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Textbook Question

A blood sample from your patient shows that she has decreased numbers of neutrophils. Predict the effects of this condition. How would it differ if numbers of T lymphocytes were decreased instead?

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Textbook Question

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

a. γ-Globulins

b. Albumin

c. α-Globulins

d. Clotting proteins

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Erythrocytes are biconcave discs with prominent nuclei.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The main function of erythrocytes is to transport oxygen on the protein hemoglobin.

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