Blood

Blood

Detecting Blood, Human vs. Animal and Typing

Multiple Choice

What is the first step in identifying a red stain found on a piece of fabric found at the scene of a crime as blood

• Testing for carbon dioxide levels

• DNA testing

• presumptive testing

Multiple Choice

Which reagent would you use to confirm the presence of blood?

• Phenolthalein

• O-toluidine

• Ninhydrin

Multiple Choice

11. Based on the above test results, that showed a pink color on the swab, do you believe blood is present?

• Definitely blood

• Probably blood

• not blood

Multiple Choice

11. Once the presence of blood has been confirmed using the above presumptive test, what would be your next step?

• Run DNA testing

• . We’re done , this is blood

• Confirm the presence of blood

Multiple Choice

How many parts is the blood made up from?

• 3

• 3

• 5

• 4

• 4

Multiple Choice

What does blood consist of?

• plasma, red blood cells, white blood cells, platelets

• hormones, oxygen, nutrients, water

• carbon dioxide and minerals

• red blood cells

Multiple Choice

What part of blood is responsible for carrying oxygen and carbon dioxide to or from body cells?

• Red Blood Cells

• White Blood cells

• Platelets

• Plasma

Multiple Choice

What part of blood is responsible for carrying wastes, nutrients, and minerals?

• Red blood cells

• White blood cells

• Platelets

• Plasma

Multiple Choice

_______ is made mostly of water and makes up about 55% of the blood

• Plasma

• Platelete

• Red blood cells

• White blood cells