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Forensic Serology
| Term | Definition |
|---|---|
| serology | study of blood |
| blood | refers to a highly complex mixture of cells, enzymes, proteins, and inorganic substances |
| plasma | fluid portion of blood |
| erythrocytes | red blood cells |
| leukocytes | white blood cells |
| platelets | solid materials in the plasma |
| antigens | usually proteins, are located on the surface of red blood cells and are responsible for blood-type characteristics |
| 55 | blood is ?% plasma |
| 45 | blood is ?% cellular components |
| away | the main arteries carry blood _______ the heart |
| to | veins carry blood _________ the heart |
| blood pressure provided by the heart pumping fluid around | blood spurts out from the arteries and veins because ? |
| bone marrow | blood cells formed in the ? |
| die | blood cells never ? |
| white blood cells | immune system |
| red blood cells (no nucleus/DNA) | oxygen |
| A-B-O and Rh systems | blood typing |
| Karl Landsteiner | discovered A-B-O and Rh |
| D antigen | Rh factor is determined by the presence of ? |
| serum | liquid that separates from the blood when clotting |
| Kastle-Meyer | uses H2O2 + phenolphthalein to produce a bright pink color in the detection of peroxidase activity in the blood |
| leucomalachite green | dropped on the suspected blood stain. a positive blood result will immediately turn the swab greenish-blue |
| tetramethylbenzidine | test by placing drops on a suspected stain. a positive reaction is indicated by an intense blue color |
| luminol | used in investigation tv shows. involves spraying the chemical onto the suspected blood stain and viewing it in total darkness |
| luminol | capable of detecting bloodstains diluted up to 300,000 times |
| preciptin test | indicates which species the blood belongs to |
| width/length then take the inverse sin | arcsin |
| travel | narrow end of a blood drop will point in the direction of ? |
| point of origin | if you have more than one drop, the ? can be determined |
| acid phosphatase | enzyme present in high concentrations of semen |
| oligospermia | abnormally low sperm count |
| aspermia | absence of sperm or sterility |
| Locard's Exchange Principle | theres always some evidence left behind |
| 4-6 hours | sperm can survive up to ? in the vaginal cavity |
| 3 days | nonmotile sperm may be found up to ? |
| 48 hrs | acid phosphatase can be detected up to ? |
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