Exam 1: Dr. Pruett Chapter 2 Flashcards
What are the 3 major lineages of hematopoiesis?
Erythroid
Myeloid
Lymphoid
What does the erythroid lineage produce?
Platelets and erythrocyte (blood)
What does the myeloid lineage produce?
Neutrophil (blood) Basophil (blood) Eosinophil (blood) Monocyte (blood) Macrophage (tissue) Dendritic cell (tissue) Mast cell (tissue)
What does the lymphoid lineage produce?
NK cell (blood)
T cell, blood (effector T cell, tissue)
B cell, blood (plasma cell, tissue)
How can monitoring changes to hematopoiesis be achieved?
Complete blood cell counts
Observing changes in bone marrow aspirates
What is the first cell type to arrive at the site of an infection from the blood?
Neutrophils
What do dead neutrophils make up?
Pus
What are the classifications of a neutrophil?
Granulocyte
Phagocyte
What is the life-span of neutrophils?
48 to 72 hours
What is the primary function of neutrophils?
Antimicrobial effectors, particularly in acute bacterial infection
What is the mechanism of action for neutrophils?
Phagocytosis
Degranulation
Neutrophil extracellular trap formation
What is the classification of an eosinophil?
Granulocyte
What is the life span of eosinophils?
Days to weeks
What is the primary function of eosinophils?
Antiparasitic effectors, particularly in helminthic infection
Some antiviral action
Roles in allergy
What is the mechanism of action for eosinophils?
Degranulation
Limited phagocytosis
What are eosinophils characterized by?
Pink granules
What do the granules in eosinophils do?
Attract other cell types
What is the classification of basophils?
Granulocyte
What is the life span of basophils?
Days
What is the primary function of basophils?
Mediator of inflammation
What is the mechanism of action for basophils?
Degranulation
What is the basophil characterized by?
Large, purple granules
What is similar to basophils, but is in the tissues?
Mast cells
What is the classification of mast cells?
Sentinel cells
What is the location of mast cells?
Tissue
What is the life span of mast cells?
Weeks to months
What is the primary function of mast cells
Immune surveillance
Mediator and amplifier of inflammation and allergy
What is the mechanism of action for mast cells?
Detection of threats and release of inflammatory mediators via degranulation or synthesis of lipid mediators and cytokines
What is the classification of a NK cell?
Lymphocyte
What is the life span of NK cells?
Weeks to months
What is the primary function of NK cells?
Destruction of virally infected or abnormal host cells (including tumor cells)
What is the mechanism of action for NK cells?
Recognition of virally infected or abnormal host cells and targeted release of cytotoxic granules
What are innate-like lymphocytes used in?
Some therapeutic treatments
What is an example of an innate-like lymphocyte?
NK cells
What is the life span of monocytes?
Days
What is the primary function of monocytes?
Precursors of macrophages and DCs
What is the mechanism of action for monocytes?
Limited antimicrobial function in blood
What type of cells are monocytes/macrophages?
Phagocytic cells
Where do monocytes/macrophaes move within? What do they do specifically there?
Tissues
Detect and move to microbes
What do monocytes/macrophages do?
Kill microbes and involved in tissue healing/remodeling
What is the life span of macrophages?
Months
What is the primary function of macrophages?
Immune surveillance, moderate antimicrobial capacity, limited antigen presentation
What is the mechanism of action for macrophages?
Detection of threats and release of inflammatory mediators
Phagocytosis
What is the life span of dendritic cells?
Months
What is the primary function of dendritic cells?
Immune surveillance, antigen processing and presentation
What is the mechanism of action for dendritic cells?
Detection of threats and release of inflammatory mediators
Endocytosis and phagocytosis
What is the classification for monocytes?
Mononuclear phagocytes
What are the classifications for macrophages?
Mononuclear phagocytes
Sentinel cell
Antigen-presenting cell
What are the classifications for dendritic cells?
Mononuclear phagocytes
Sentinel cell
Antigen-presenting cell
What is the cause of canine cyclic neutropenia?
Defective stem cell maturation in both melanocytes and bone marrow stem cells that produce neutrophils