Blood and Blood Spatter

What happens to the shape of a blood droplet as the angle of release changes from a 90-degree drop toward a 10-degree drop?

• It becomes more wider than long.

• It becomes more longer than wide

• It becomes more circular

• It has more spines

What happens to the shape of a blood droplet as the angle of release changes from a 90-degree drop toward a 10-degree drop?

• It becomes more wider than long.

• It becomes more longer than wide.

• It becomes more circular.

• It has more spines.

Red blood cells:

• carry respiratory gases, mainly oxygen and carbon dioxide.

• fight disease and foreign invaders

• aid in blood clotting

• are involved in repairing damaged blood cells

The immune system functions to protect our bodies by identifying cells or molecules that are foreign, such as

• viruses

• bacteria

• parasites

• All of these choices

Blood is the circulating tissue consisting of two types of cells: red blood cells and platelets.

• True

• False

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.

The three components of blood, red blood cells, white blood cells, and platelets, are carried throughout the body in:

• antibodies.

• plasma.

• basophil.

• monocytes.

Blood typing is less expensive and quicker for analyzing blood evidence than DNA profiling. Since many different people share the same type, this blood evidence is considered to be:

• individual evidence.

• class evidence.

• trace evidence.

• biological evidence.

In 1900, Karl Landsteiner found that the blood from one person:

• did not always freely mix with blood from another person.

• always freely mixes with blood from another person.

• always freely mixes with blood from another group of persons.

• None of these choices.

The presence or absence of particular proteins, found embedded within a cell or plasma membranes of red blood cells, determines a person’s:

• DNA.

• blood type.

• Rh factor.

• surface proteins.