Outcome 4 Serology Review

Describe how to determine someones blood type

• Blood is mixed with antibodies and if it clumps then it's their blood type

• Blood is mixed with antibodies and it should clump with the antibodies it has

• Blood is mixed with antigens and if it clumps then it's their blood type

• Blood is mixed with antigens and if it clumps with the antibodies then it's their blood type

what is agglutination?

• clumping of red blood cells
• clumping of white blood cells
• separation of red blood cells
• separation of white blood cells

what can presumptive drug tests be used for

• to see if another test is needed to ID a drug
• to see if it is a safe drug
• to see how much of the drug is in a person
• test side effects of the drug

Describe how to determine the direction that the blood was moving when viewing the spatter stains

• look at the big part of the droplet and that is the direction it is going

• toward the tail (the thinner end)

• toward the head (the thicker end)

• look at the satellites and then you can figure it out

Describe the forensic significance of identifying the type of blood spatter found at a crime scene

• They determine the time of death

• Who has died

• determine the type of wound and the type of weapon used

• Why they died

What determines blood type?

• color

• antibodies

• consistency

• antigens

What are the 3 different antigens found on red blood cells?

• A, B, Rh

• A, B, O

• A, B, C

• A, B, AB

Distinguish a difference between high-velocity blood size versus low-velocity blood spatter size(blunt-force trauma)

• High-Velocity: Less than 1mm, gunshot wound and Low-Velocity: more than 4mm, beat with a pipe
• High-Velocity: More than 4mm, beat with a pipe Low-Velocity:Less than 1mm, gunshot wound
• High-Velocity: Less than 1mm, beat with a pipe Low-Velocity: More than 4mm, gunshot wound
• High-Velocity: Less than 1mm. Low-Velocity: More than 4mm

Define Presumptive Drug Test

• indicates that a drug is present, but not the specific type of drug

• indicates that something is there- could be a drug or another substance

• indicates the exact type of drug

• indicates the amount of the drug

Compare and Contrast presumptive and confirmatory drug test

• Presumptive: indicates when blood will clump Confirmatory: indicates the blood type
• Presumptive: Indicates the blood type Confirmatory: indicates when blood will clump
• Presumptive: indicates the type of drug present Confirmatory: indicates if there is a drug present
• Presumptive: If there is a drug present Confirmatory: The type of drug present