PBS 1.1.4
Anti-A reacts with
A, AB
Which blood type reacts with both Anti-A and Anti-B
AB
Function of White Blood Cells
Active in immune response
What is this called? (the half circle on the end)
Antigen
Function of Platelets
Assists in blood clotting by adhering to other platelets and damaged epithelium.
Anti-B reacts with
B, AB
RSID and ABO Blood Type Testing are examples of
Confirmatory tests
Other name for Red Blood Cells
Erythrocytes
When a droplet of blood is dropped directly from above and strikes a horizontal surface at 90°, it produces a circular stain.
Falling Droplets
In the airplane analogy, what are the tray tables?
Fe (iron)
What is the second step in the Kastle Meyer test?
Firmly rub the moistened cotton swab against the red stain on the item until the swab absorbs the stain.
Spatters with an elliptical or elongated shape struck the surface at an angle. This often means that an external force was applied that provided horizontal velocity, speed in a given direction, to the droplets. The more elongated the droplet, the faster they were moving. The long tail of each droplet indicates the direction it was moving when it struck the surface.
Force and Direction
What are the components of a red blood cell
Hemoglobin, Fe (iron), and O2 (oxygen)
Other name for White Blood Cells
Leukocytes
Which blood type reacts with neither Anti-A nor Anti-B?
O
In the airplane analogy, what are the drinks/refreshments?
O2 (oxygen)
LCV, Luminol, and Kastle-Meyer are examples of
Presumptive Tests
When there was an impact (the larger pool), which sent blood droplets traveling away from the impact at high speed. This means the impact occurred with significant force.
Radial Spatter
Other name for Plasma
Serum
Produced when a source of liquid blood travels through the air before landing on a target surface.
Spatter Blood Spatter
What is the third step in the Kastle-Meyer test?
Use a new pipette to add two drops of 95% ethanol to the swab.
What is the fifth step in the Kastle-Meyer test?
Use a new pipette to add two drops of hydrogen peroxide to the swab. An immediate pink color is expected if blood is present. Note any color change in your data table.
What is the fourth step in the Kastle-Meyer test?
Use a new pipette to add two drops of the phenolphthalein indicator solution to the swab.
What is the first step in the Kastle-Meyer test?
Use a transfer pipette to lightly moisten a cotton swab with distilled water.
B
What blood type is this?
Antibody
What is this called?
What is it called when blood clots on a blood typing test?
agglutination
In the airplane analogy, what is the passenger?
hemoglobin
In the airplane analogy, what is the airplane?
the Red Blood Cell
What does a presumptive test tell you?
The substance might be blood
Other name for Platelets
Thrombocytes
What is the purpose of a presumptive test?
To save time, money, and effort before calling the FBI to confirm if it is blood
Occur when a blood source comes into contact with a surface. If a victim crawled on the floor or the body was dragged, then there would be smears or trails on the floor. Smudges, smears, or bloody fingerprints or handprints on furniture or doors could indicate a struggle in the room.
Transfer Blood Spatter
Function Of Red Blood Cells
Transport oxygen throughout body (give blood the red color)
Function Of Plasma
Transports nutrients, hormones, and proteins throughout the body
True or False: you need to use a control positive AND a control negative in a Kastle Meyer Test. Why?
True, to ensure the test is working properly and as comparison for the unknown substance's result
