Forensics: Serology Test Review
Questions And Answers 100% Correct
what are the two parts of blood? plasma and cells
what is plasma? makes up 55% of blood; fluid portion
what are the two types of cells? 1. erythrocytes (red)
2. leukocytes (white)
what are erythrocytes? red blood cells (Hemoglobin)
what is hemoglobin? a protein that carries oxygen and gives red color
what are antigens? proteins found on the surface of RBC
what are antibodies? a reactive protein found in the serum of the blood && specific to a
certain antigen
, Forensics: Serology Test Review
Questions And Answers 100% Correct
what three questions should you ask about an unknown substance that is possibly blood?
1. Is it blood?
2. Is it human?
3. If human, what type? and can the sex, age, race of the source be determined?
what tests to see if a substance is blood? 1. Kastle-Meyer
2. Hemastix
3. Luminol
what tests to see if blood is human? Precipitin
what is the Kastle-Meyer test? -not specific for blood (PRESUMPTIVE)
-some vegetable matter will also react (potatoes and horseradish)
-mixes bloodstain, alcohol, phenolphthalein, and hydrogen peroxide to form PINK COLOR
what is the Hemastix test? -moisten strip with distilled water and place in contact with
stain
-strip will turn green with blood
Questions And Answers 100% Correct
what are the two parts of blood? plasma and cells
what is plasma? makes up 55% of blood; fluid portion
what are the two types of cells? 1. erythrocytes (red)
2. leukocytes (white)
what are erythrocytes? red blood cells (Hemoglobin)
what is hemoglobin? a protein that carries oxygen and gives red color
what are antigens? proteins found on the surface of RBC
what are antibodies? a reactive protein found in the serum of the blood && specific to a
certain antigen
, Forensics: Serology Test Review
Questions And Answers 100% Correct
what three questions should you ask about an unknown substance that is possibly blood?
1. Is it blood?
2. Is it human?
3. If human, what type? and can the sex, age, race of the source be determined?
what tests to see if a substance is blood? 1. Kastle-Meyer
2. Hemastix
3. Luminol
what tests to see if blood is human? Precipitin
what is the Kastle-Meyer test? -not specific for blood (PRESUMPTIVE)
-some vegetable matter will also react (potatoes and horseradish)
-mixes bloodstain, alcohol, phenolphthalein, and hydrogen peroxide to form PINK COLOR
what is the Hemastix test? -moisten strip with distilled water and place in contact with
stain
-strip will turn green with blood
