Chapter 8: Mindtap blood and blood spatter Test

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

True.

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

False

Sir William Osler discovered platelets in 1874. True or False

True

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

False

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

False

Red blood cells:

carry respiratory gases, mainly oxygen and carbon dioxide.

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

Bacteria, viruses, parasites, all the above

White blood cells secrete proteins:

known as antibodies, 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:

Plasma

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.

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

Each blood type is determined by:

An antibody reaction test

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

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

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

Type O

What term describes the clumping of red blood cells?

Agglutination

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 wider

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

swipe

Today blood splatter evidence is used to explain events: 

during crime-scene analysis.

Given ________ it is possible to determine the direction the blood was traveling, the angle of impact, and the point of origin of the blood.

Blood spatter patterns

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

Satellite

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

The attraction between molecules of unlike substances (like blood and ceiling tile) is called_________

Adhesion

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

Medium