NCLEX : Blood and Plasma
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Example Question #26 : Circulatory System
The process by which white blood cells move into and out of blood vessels is __________.
Granulocytosis
Diapedesis
Endocytosis
Phagocytosis
Diapedesis
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 #27 : Circulatory System
All of the following white blood cells are granulocytes except __________.
Neutrophils
Eosinophils
Monocytes
Basophils
Monocytes
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 #28 : Circulatory System
Platelets are derived from what parent cell?
Plasma cells
Megakaryocytes
Erythrocytes
Progranulocytes
Megakaryocytes
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 #11 : Blood And Plasma
What is the average amount of blood in the adult body?
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 #62 : Circulatory And Respiratory Systems
The most common free plasma proteins include all of the following except __________.
globulin
major histocompatibility complex (MHC)
fibrinogen
albumin
major histocompatibility complex (MHC)
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 #355 : General Biology
Lymphocytes (natural killer cells, T helper cells, and B cells) make up what percentage of white blood cells?
26-33%
55-70%
1-3%
5-15%
26-33%
Lymphocytes are the second most common class of white blood cells, making up 26-33% of white blood cells.
Example Question #356 : General Biology
Which of the following blood cells is anucleate (lacking a nucleus)?
Megakaryocytes
Erythrocytes
Natural killer cells
Dendritic cells
Erythrocytes
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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