Unit 4 Forensic Science - Blood

Red blood cells are called what?

• Erythrocytes

• Plasma

• Leukocytes

• Thrombocytes

White blood cells main job are to:

• Carry oxygen to the body's cells and carbon dioxide away.

• Aid in blood clotting and repair the damaged blood vessels.

• Suspend blood cells inside of the body.

• Fight disease and foreign invaders.

White blood cells secrete proteins:

• known as antibodies, which assist in the immune response.

• known as viruses, which assist in the immune response.

• known as bacteria, which assist in the immune response.

• known as parasites, which assist in the immune response.

A and B proteins are found on the surface of some red blood cells. If a person's blood contains both A and B proteins, then he or she has:

• type A blood

• type B blood

• type AB blood

• type O blood

Blood type is determined by proteins called __________ which are found on the surface of the blood.

• antigens

• antibodies

• agglutination

• red blood cells

Which type of blood cells contain DNA?

• all blood cells contain DNA

• White blood cells

• Red blood cells

• Red and White blood cells

When testing blood type of a crime suspect, the crime scene investigator notes that the blood does not agglutinate in ANY of the testing wells. What type of blood does the suspect have?

• AB+

• A-

• O-

• O+

If a crime scene investigator is trying to determine if a sample at a crime scene is blood, they would use all of the following tests except:

• Kastle-Meyer Test

• Gel Electrophoresis

• Hemastix

• Luminol Test

You walk into a crime scene and see several drops of flood on the floor. They look as if they are perfect circular drops. This indicates (at first glance) what type of bleed?

• Arterial Spurt

• Trail

• Passive blood spatter

• Pool

How frequent is A blood type in the nation?

• 12%

• 3%

• 43%

• 43%