MT CH11 Blood Cells Flashcards
(21 cards)
What is the number of erythrocytes (red blood cells) per microliter of blood?
5 million
Erythrocytes are responsible for transporting oxygen and some carbon dioxide in the blood.
What is the number of leukocytes (white blood cells) per microliter of blood?
5,000 to 10,000
Leukocytes play a crucial role in immunity and protect against pathogens.
What is the number of platelets (thrombocytes) per microliter of blood?
150,000 to 450,000
Platelets are essential for hemostasis and blood clotting.
What is the primary function of erythrocytes?
Carries hemoglobin; also carries some carbon dioxide and buffers blood
Hemoglobin is the protein that binds oxygen in red blood cells.
What is the primary function of leukocytes?
Immunity; protects against pathogens and destroys foreign matter and debris
Leukocytes are located in blood, tissues, and the lymphatic system.
What is the primary function of platelets?
Forms a platelet plug and starts blood clotting (coagulation)
Platelets are fragments of large cells called megakaryocytes.
What shape do erythrocytes have?
Disk without nucleus (anuclear)
The lack of a nucleus allows more space for hemoglobin.
What distinguishes granulocytes from agranulocytes?
Segmented vs. unsegmented nuclei
Granulocytes have prominent segmented nuclei, while agranulocytes do not.
True or False: Erythrocytes contain a nucleus.
False
Erythrocytes are anuclear and rely on their hemoglobin for oxygen transport.
Fill in the blank: Platelets are fragments of large cells called _______.
megakaryocytes
Megakaryocytes are responsible for the production of platelets in the bone marrow.
What are the two main classifications of leukocytes?
Granulocytes and agranulocytes
Granulocytes contain granules in their cytoplasm, while agranulocytes do not.
What is the function of neutrophils?
Phagocytosis
Neutrophils are the most abundant type of white blood cells and play a crucial role in the immune response.
What percentage of leukocytes do eosinophils represent in adults?
1 to 3 percent
Eosinophils are involved in allergic reactions and defense against parasites.
Which type of leukocyte stains strongly with basic dyes?
Basophils
Basophils are involved in allergic reactions and inflammation.
What is the relative percentage of lymphocytes in adults?
25 to 38 percent
Lymphocytes are key players in the immune system, including T cells and B cells.
What is the primary function of monocytes?
Phagocytosis
Monocytes differentiate into macrophages and dendritic cells in tissues.
Fill in the blank: Neutrophils stain _______ with both acidic and basic dyes.
weakly
This characteristic helps in identifying neutrophils under a microscope.
True or False: Basophils represent less than 1 percent of leukocytes.
True
Basophils are the least common type of granulocyte.
What are the three types of granulocytes?
Neutrophils, eosinophils, basophils
Each type has distinct functions and staining properties.
What is the role of eosinophils in the immune response?
Allergic reactions; defense against parasites
Eosinophils are particularly effective against multicellular parasites.
Fill in the blank: The relative percentage of basophils in adults is _______.
less than 1 percent
Basophils play a role in inflammatory responses, particularly in allergic reactions.
