NCLEX : Blood and Plasma

Study concepts, example questions & explanations for NCLEX

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Example Questions

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Example Question #52 : Circulatory And Respiratory Systems

The process by which white blood cells move into and out of blood vessels is __________.

Possible Answers:

Phagocytosis

Diapedesis

Granulocytosis

Endocytosis

Correct answer:

Diapedesis

Explanation:

Diapedesis, also known as leukocyte extravasation, is the process by which white blood cells move into and out of blood vessels. This process includes four stages: chemoattraction, rolling adhesion, tight adhesion, and endothelial transmigration. This process is integral in the delivery of white blood cells to sites of infection and in their return into the blood stream to mobilize and facilitate the excretion of waste.

Example Question #652 : Nclex

All of the following white blood cells are granulocytes except __________.

Possible Answers:

Neutrophils

Eosinophils

Basophils

Monocytes

Correct answer:

Monocytes

Explanation:

Neutrophils, eosinophils, and basophils are all granulocytes, meaning they contain visible granules within their cytoplasms. These granules contains acids and antimicrobial enzymes, and are released at the site of infection. Monocytes and lymphocytes are agranulocytes, meaning they do not contain granules in their cytoplasm but rather destroy foreign proteins by other means, such as phagocytosis and cytotoxicity.

Example Question #21 : Circulatory System

Platelets are derived from what parent cell?

Possible Answers:

Progranulocytes

Megakaryocytes

Plasma cells

Erythrocytes

Correct answer:

Megakaryocytes

Explanation:

Platelets are derived from megakaryocytes, cells produced in bone marrow, kidney, liver, and spleen, with large, lobed nuclei. Platelets are formed within the cell and then released into plasma. Erythrocytes (mature red blood cells), plasma cells (a type of B cell) and progranulocytes (precursors to neutrophils, basophils, and eosinophils) take no part in the creation of platelets, which are fragments of cells, not whole cells.

Example Question #14 : Blood And Plasma

What is the average amount of blood in the adult body?

Possible Answers:

Correct answer:

Explanation:

The average adult body contains 4.5-6 liters of blood, depending on size and gender. Blood volume (BV) can be calculated by the following formula, given the hematocrit (HC) and plasma volume (PV):

Example Question #31 : Circulatory System

The most common free plasma proteins include all of the following except __________.

Possible Answers:

fibrinogen

albumin

major histocompatibility complex (MHC)

globulin

Correct answer:

major histocompatibility complex (MHC)

Explanation:

The three main types of proteins in the blood are albumin, globulin, and fibrinogen. Major histocompatibility complex is not a free plasma protein, but rather a class of proteins found on the surface of all nucleated cells (MHC class I) and on the surface of certain immune cells known as antigen-presenting cells (MHC class II). They play an important part in immune function by displaying foreign antigens for communication between leukocytes.

Example Question #11 : Blood And Plasma

Lymphocytes (natural killer cells, T helper cells, and B cells) make up what percentage of white blood cells?

Possible Answers:

5-15%

1-3%

26-33%

55-70%

Correct answer:

26-33%

Explanation:

Lymphocytes are the second most common class of white blood cells, making up 26-33% of white blood cells. 

Example Question #31 : Circulatory System

Which of the following blood cells is anucleate (lacking a nucleus)?

Possible Answers:

Dendritic cells

Erythrocytes

Megakaryocytes

Natural killer cells

Correct answer:

Erythrocytes

Explanation:

The only anucleate blood cells are erythrocytes, or red blood cells. These cells are created with nuclei, but each daughter cell will then lose its nucleus in order to create more suface area for hemoglobin to bind oxygen and for easier passage through narrow capillaries. 

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