Chapter 11 - Blood Flashcards
Cellular components of blood, 45% of blood
Formed elements
Liquid that makes up 55% of blood
Plasma
Help balance water flow between blood and cells
Plasma proteins
Important for blood’s water-balancing ability
Albumins
Transport lipids and fat-soluble vitamins, some are antibodies
Globulins
Give rise to the formed elements, within red blood marrow
Stem cells
Formed elements
Platelets, white blood cells, red blood cells
Sometimes called thrombocytes; fragments of larger precursor cells called megakaryocytes; essential to blood clotting
Platelets
Also called leukocytes; have a nucleus; removes waste and helps defend body against disease
White blood cells
Possess granules
Granulocytes
Lack visible granules
Agranulocytes
Engulf microbes by phagocytosis, thus curbing the spread of infection
Neutrophils
Defend against parasitic worms; lessen the severity of allergies
Eosinophils
Release histamine that attracts other white blood cells and causes the blood vessels to dilate; also play a role in some allergic reactions
Basophils
Largest of the formed elements; develop into macrophages
Monocytes
B and T
Lymphocytes
Give rise to plasma cells, which produce antibodies
B lymphocytes
Specialized white blood cells; kills cells not recognized as coming from the body, cells that are cancerous
T lymphocytes
Proteins that recognize specific molecules (antigens) on the surface of invading microbes or other foreign cells
Antibodies
Also called erythrocytes; transport oxygen to cells; no nucleus; contains hemoglobin
Red blood cells
Oxygen-binding pigment in RBCs; molecule has four subunits; polypeptide chain and heme group
Hemoglobin
Hemoglobin bound to oxygen
Oxyhemoglobin
Kidney cells sense reduced oxygen and produce this hormone; stimulates the red blood marrow to produce more RBCs
Erythropoietin
The blood’s ability to carry oxygen is reduced
Anemia
Iron-deficiency, hemolytic anemia (sickle cell), pernicious anemia
Types of anemias
Leads to inadequate hemoglobin production; an inability to absorb iron
Iron deficiency
When red blood cell destruction exceeds production
Hemolytic anemia
Caused by abnormal hemoglobin; RBCs in sickle shape
Sickle-cell anemia
Occurs when there is insufficient production of RBCs; caused by failure to produce intrinsic factor
Pernicious anemia
Viral disease of the lymphocytes caused by the Epstien-Barr virus
Infectious mononucleuosis
A cancer of the WBCs that cause the number of WBCs too greatly increase
Leukemia