6 Written Questions

1. tiny cells involved in blood clotting
2. decay caused by bacterial growth within cells (decomposing animal proteins, this rotting causes a strong odor)
3. a device that rapidly spins a test tube of blood causing the cells to settle at the bottom with the plasma left on top
4. a chemical used to reveal latent blood in extremely small amounts even if the area has been cleaned (unless cleaned with bleach). Its chemical reaction with hemoglobin produces light (luminescence). It can detect blood in dilution up to 1 in 5 million.
5. bleeding to death
6. an elastic-like property that holds liquid together in a spherical shape. Example: Beading of rain water on the surface of a waxed car. Water adheres weakly to wax and strongly to itself, so water clusters into drops. Surface tension gives them their near-spherical shape because a sphere has the smallest possible surface area to volume ratio.

5 Multiple Choice Questions

1. the liquid portion of whole blood containing proteins, enzymes, clotting factors, electrolytes and various types of cells.
   1. Velocity
   2. Plasma
   3. Platelets
   4. Serum
2. reveals blood like luminol but thicker (sticks better to walls) and bleach doesn't interfere with its results.
   1. Fluorescein
   2. Putrefaction
   3. Plasma
   4. Platelets
3. a measure of thickness; Blood viscosity is a measure of the resistance of blood to flow, the more viscous the blood, the harder the heart must work to move it around.
   1. Viscosity
   2. Velocity
   3. Platelets
   4. Plasma
4. more expensive and time consuming tests that prove blood is present
   1. Erythrocytes
   2. Fluorescein
   3. Confirmatory test
   4. Presumptive test
5. the yellowish liquid remaining after whole blood is allowed to clot; it contains most of the proteins and enzymes of plasma but none of the cells or clotting factors.
   1. Plasma
   2. Serum
   3. Velocity
   4. Luminol

5 True/False Questions

1. Erythrocytes → tiny cells involved in blood clotting

   True        False

2. Presumptive test → a test which indicates a likelihood (presumes) that blood is present but doesn't establish it as fact.

   True        False

3. Leucocytes (leukocytes) → red blood cells; carries oxygen from the lungs to the body tissues, color comes from hemoglobin

   True        False

4. Antigens → important molecules that instigate immune reactions within the body and help determine your blood type; any substance that causes your immune system to produce antibodies against it.

   True        False

5. Velocity → a measure of speed

   True        False