CHAPTER 8 BLOOD SPLATTER

In 1940, Alexander Weiner, working with Rhesus monkeys, noticed another type of red cell protein. This red cell protein, called RH factor, is on the red blood cells of:

85 percent of the human population.

What term describes the clumping of red blood cells?

Agglutination

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

F

In 1728, Sir William Harvey determined that there was a continuous circulation of blood within the body.

F

The presence or absence of antigens on white blood cells determines a person's blood type

F

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 longer than wide.

Of the four main human blood types using the ABO system, the largest percentage of the U.S. population is made up of:

O

Given blood spatter patterns, it is possible to determine the direction the blood was traveling, the angle of impact, and the point _________________________________________.

Origin

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

Plasma

If blood lands on a porous surface, such as wood or ceiling tile, then the edge of the drop of blood may form extensions or small ___________________________.

Spines

Which type of bloodstain pattern suggests that bloody hair was dragged across the floor?

Swipe

Blood has been studied to one degree or another for thousands of years.

T

Sir William Osler discovered platelets in 1874.

T

Today blood splatter evidence is used to explain events at:

a violent scene.

A force between two unlike surfaces, such as blood and the surface of a wall, is ______________________________.

adhesion

Each blood type is determined by:

an antibody reaction test.

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

blood type.

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

by identifying cells or molecules that are foreign, such as bacteria and parasites (All of these choices)

Red blood cells (erythrocytes):

carry respiratory gases, mainly oxygen and carbon dioxide.

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:

class evidence.

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

did not always freely mix with blood from another person.

White blood cells secrete proteins:

known as antibodies, which assist in the immune response.

A______velocity-sized blood splatter (1 to 4 mm) is caused by beatings or stabbings.

medium

If any of the blood does overcome cohesion and separate from the main droplet of blood, it will form small secondary droplets known as ________________________________.

satellites

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

type AB blood.