True/False
Blood has been studied to one degree or another for thousands of years.
True
Red blood cells (erythrocytes):
a. carry respiratory gases, mainly oxygen and carbon dioxide.
b. fight disease and foreign invaders.
c. aid in blood clotting.
d. are involved in repairing damaged blood cells.
a. carry respiratory gases, mainly oxygen and carbon dioxide.
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
In 1900, Karl Landsteiner found that the blood from one person:
a. did not always freely mix with blood from another person.
b. always freely mixes with blood from another person.
c. always freely mixes with blood from another group of persons.
d. None of these choices.
a. did not always freely mix with blood from another person.
This cell carries oxygen throughout the body.
Red Blood Cell
William Osler discovered platelets in 1874.
True
The immune system functions to protect our bodies by identifying cells or molecules that are foreign, such as:
a. viruses. c. parasites.
b. bacteria. d. All of these choices.
d. All of these choices.
This cell protect our bodies from illness and disease by destroying foreign materials.
White Blood Cells
The presence or absence of particular proteins, found embedded within a cell or plasma membranes of red blood cells, determines a person’s:
a. DNA. c. Rh factor.
b. blood type. d. surface proteins.
b. blood type
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 ___________________________.
Spikes
Percy Oliver developed a method to store blood for transfusions.
False (the Mayo Clinic 1935)
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:
a. individual evidence. c. trace evidence.
b. class evidence. d. biological evidence.
b. class evidence.
A force between two unlike surfaces, such as blood and the surface of a wall, is ______________________________.
adhesion
*cohesion is the attraction blood has to itself.
Each blood type is determined by:
a. a DNA reaction test. c. a protein reaction test.
b. an antibody reaction test. d. a RF factor reaction test.
b. an antibody reaction test.
A _____________________ is a two-dimensional view of the intersection of lines formed by drawing a line through the main axis of at least two drops of blood that indicates the general area of the source of the blood spatter.
line of convergence
The virus causing AIDS was discovered in 1974
False (1984)
In 1982, white blood cells were used as a source of DNA by Dr. Alec Jeffreys to produce the first:
a. DNA profile. c. DNA prognosis.
b. DNA study. d. DNA blood study.
a. DNA profile.
The clumping of molecules or cells in the blood is known as ____________________.
agglutination
Of the four main human blood types using the ABO system, the largest percentage of the U.S. population is made up of:
a. Type O. c. Type B.
b. Type A. d. Type AB.
a. Type O
A _____________________ is a three-dimensional view formed using lines and angles of impact of at least two different drops of blood to identify the source and location of the blood splatter.
point of origin
Dr. Max Perutz described the structure of hemoglobin in 1959.
True
White blood cells secrete proteins:
a. known as antibodies, which assist in the immune response.
b. known as viruses, which assist in the immune response.
c. known as bacteria, which assist in the immune response.
d. known as parasites, which assist in the immune response.
a. known as antibodies, which assist in the immune response.
Any foreign substance or cell in the body that reacts with antibodies is a(n) ________________.
antigen
The presence of different blood types was discovered in:
a. 1882. c. 1900.
b. 1892. d. 1912.
c. 1900.
________________ are proteins embedded in the cell membrane.
cell-surface protein