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vc a&p study guide
vc lvn chap 16 study guide
| Question | Answer |
|---|---|
| What are three functions of the blood? | transports, protects against excessive bleeding, regulates temp |
| What are the physical characteristics of blood? | bright/dk red, thick viscosity |
| What is the composition of blood plasma? | 90% Water and 8% protein |
| What are 4 different kinds of substances transported in the blood plasma? | proteins, ions, nutrients, waste products, gases and hormones |
| What is the precursor cell of all blood cells? | Stem cells (hemocytoblast) |
| State the function of erythrocytes. | transport of O2 and CO2, |
| Hematocrit | volume % of blood cells in whole blood; packed cell volume. |
| leukocytosis | Too many leukocytes |
| monocytes | Become macrophages and phagocytize dead tissue |
| lymphocyte | Produce antibodies |
| Eosinophils | Detoxify foreign proteins |
| Phagocytize pathogens | neutrophils |
| Contain the anticoagulant heparin | Basophils |
| Recognize antigens as foreign | T lymphocytes |
| Secretes histamine during inflammation | Basophils |
| What are the different types of blood? | Type A, B, AB, O |
| What determines the blood type? | antigen |
| Explain what happens if a person with type O positive receives blood from a person with type A negative. | the body will reject and start clotting |
| What are the 3 mechanisms of blood clotting and describe each? | Vascular spasm, Platelet plug, Chemical Clotting |
| With respect to chemical blood clotting/name the organ that produces many of the clotting factors. | Liver |
| With respect to chemical blood clotting/name the vitamin necessary for Prothrombin synthesis. | Vitamin K |
| With respect to chemical blood clotting/state what the clot itself is made of. | fibren |
| Define Vitamin K | Helps body to make prothrombin |
| Define Thrombus | stationary blood clot |
| Define embolus | moving clot |
| Define hemophilia | Doesn't have a clotting factor |
| Define anticoagulant | prevents blood from clotting |
| Define clotting | fibren form together |
| Total blood volume | Blood volume 4-6 Liters Plasma 55%, Formed Elements-45% |
| Polycythemia | too many red blood cells |
| Anemia | too few red blood cells |
| Type of cells in the formed elements? | Formed Elements, Plasma-3rd major fluid-55%, Formed Elements-blood cells-45% Formed Elements-Erythrocytes (RBC), Thrombocytes (platelets), Luekocytes (WBC) |
| Hemoglobin | iron containing protein in red blood cells responsible for O2 carrying |
| leukopenia | too few blood cells |
| albumin | holds water |
| globulin | antibodies |
| 3 mechanisms of blood clotting | vascular spasm, platelet plug, chemical clotting |
| descriptions of: vascular spasm platelet plug chemical clotting | injury stop the flow of blood to tissue release of prothrombin |