Serology Flashcards
Agglutination
The clumping of molecules or cells
Antibodies
Proteins secreted by white blood cells that attach to antigens
Antigen-Antibody response
A reaction in which antibodies attach to specific antigens
Antigen
Any foreign substance or cell in the body that reacts with antibodies
Cell surface protein
Proteins embedded in the cell membrane
Lines of convergence
A two dimensional view of the intersection of lines
Point of origin
A THREE dimensional view formed using lines of convergence
Red blood cells
Donut shaped cells that carry oxygen throughout the body
Satellite drop of blood
Secondary drop formed when some blood breaks free from the main contact drop of blood
White blood cells
Cells that police the body by destroying foreign materials
True or false. Correct the statement if it’s false.
Blood typing is class evidence.
True
True or false. Correct the statement if it’s false.
DNA blood testing is class evidence.
False
Individual
True or false. Correct the statement if it’s false.
The Kastle-Meyer test can tell you if there is blood at the scene.
True
True or false. Correct the statement if it’s false.
Blood consists of red blood cells, white blood cells and plasma.
True
True or false. Correct the statement if it’s false.
When testing blood type, white blood cells are analyzed.
False
Red blood cells
True or false. Correct the statement if it’s false.
Human red blood cells have no nucleus, while the red blood cells of all other animals have a nucleus.
False
Most other animals will not have a Nucleus
True or false. Correct the statement if it’s false.
There is no difference in the look of blood dropped from 15 cm and from 150 cm.
False
15cm is smaller blood drop with no satellites and spines
150cm larger drop, many spines and satellites
True or false. Correct the statement if it’s false.
Blood drops look the same on all surfaces
False
smaller on smooth surfaces
True or false. Correct the statement if it’s false.
If a person is bleeding while running, the spines and satellites on the drops will point in the direction in which he is running.
True
True or false. Correct the statement if it’s false.
A person with Type O blood has antigens for A and B.
False
Antibodies
True or false. Correct the statement if it’s false.
Cast off blood looks similar to high velocity spatter.
False
Cast off roundish drops in a line
High velocity looks like a fine mist of blood
True or false. Correct the statement if it’s false.
A person who has type B- blood can receive blood from a person who has O- blood.
True
True or false. Correct the statement if it’s false.
The area of convergence can be determined by drawing lines from each of the blood drops through the long axis of each drop.
True but have to be drawn in the opposite direction of the satellites
Agglutinates
Clumps
What are the steps for testing for blood types?
- Put blood in a tube.
- Add antibodies.
- Look for agglutination.
If the blood clumps or Agglutinates what does that tell you?
It is that type of blood
Using the K-M test what color will the swab turn if blood is present?
Bright pink or purple
What blood type is known as the universal donor?
O-
What does universal donor mean
Can donate blood to all other blood groups
What blood type is known as the universal acceptor?
AB+
What does universal acceptor mean?
Can accept blood from all different blood types
How can you tell the difference between arterial spurts from a cast off
Arterial spurts are separated by space.
Cast off will be a continuous line of drops.
What causes agglutination?
Antigen - antibody interaction
What is one difference between human and animal blood
Human blood has bigger plasma
animals have smaller plasma
