Worksheetsuntitled
Total questions: 69
Worksheet time: 33mins
The Kastle-Meyer Test is a
negative test for DNA.
positive test for bacteria.
presumptive test for blood.
confirmatory test for blood.
The proper method of taking off gloves involves
taking one glove off at a time, touching only the outside of the gloves, and using one glove as a "bag" to hold the other glove.removing the gloves under running water.
pulling off both gloves at the same time.
removing the gloves under running water.
cutting off the gloves.
An appropriate example of a positive control for an experiment that tests for COVID-19 is
blood.
a sample of a virus that causes the flu.
water.
a sample of the virus that causes COVID-19.
A swab was taken of a red stain on the floor of a crime scene. The result of a Kastle-Meyer test performed on this swab is shown here. What does this result indicate?
The result is negative, meaning that the stain is blood.
The result is positive, meaning that the stain may be blood.
The result is negative, meaning that the stain is not blood.
The result is positive, meaning that the stain is most certainly blood.
A presumptive test
usually is done first, is quick and indicates a possible positive result.
is always negative.
usually is done at the lab, takes longer and indicates a 100% certainty positive result.
usually is done first, is quick and indicates a 100% certainty positive result.
According to the chart shown here, which patient has blood type AB?
Patient 1
Patient 2
Patient 3
Patient 4
Agglutination also means
the antibodies that are circulating in blood.
clumping of red blood cells.
presumptive blood tests.
blood type.
Which blood type would most likely be considered a "universal donor" meaning that this blood type can be given to any person that needs blood?
type A
type AB
type B
type O
If a person has blood type A, what would be circulating in their blood?
*It is possible that there are more than one correct answer. You must select ALL the correct answers to get the point.
anti-A antibody
anti-B antibody
antigen A
antigen B
"+" means there is a positive result. "-" means there is a negative results.
Patient D has blood type
A
AB
O
B
According to the graph shown here, what is the independent variable of this experiment?
average blood diameter
blood spatter diameter
angle of blood spatter
height of blood dropped
Which component of blood makes up the majority (over 50%) of total blood volume?
erythrocytes
platelets
plasma
lymphocytes
A blood spatter analyst examines
the location of blood stains.
the distribution of blood pools.
the distribution of blood droplets.
the shape of blood stains and puddles.
Which of the following would be an appropriate hypothesis for an experiment?Does caffeine affect reading test scores?
Does caffeine affect reading test scores?
If a subject consumes at least 50 mg of caffeine, then the scores on a reading test will improve by an average of 2 points.
The Effect of Caffeine on Reading Test Scores
the group of subject participants getting decaf coffee or coffee with 0 mg of caffeine
A dependent variable in an experiment should always be
the diameter
measurable
specific
countable
Procedures should
only make sense to the people who are writing them.
be specific, with measurements, numbers and details.
be reproducible when other people perform them.
be more than 20 steps.
A stain such as the one shown here would most likely be classified as
falling droplet.
elongated tail.
radial spatter.
transfer.
Which blood spatter pattern represents a gravity spatter, dropped from a near 90 degree angle?
A
B
C
D
A fast or high velocity blood spatter stain is usually indicated by
a large, round pattern.
a smeared pattern.
a long tail.
a long oval shape.
Passive or gravity blood stain patterns would usually be caused by
a blunt force trauma injury.
a gunshot.
walking over a puddle of blood and leaving prints.
dropping straight down from a source of bleeding.
The purpose of plasma in blood is to
transports oxygen from the lungs to other parts of the body.
fight infections.
make blood red.
acts as the major medium that holds, carries and transports all the other components of blood, including nutrients, antibodies, food, waste and other cells.
clot cuts and damaged blood vessels.
Thrombocytes are also known as
plasma.
platelets.
red blood cells.
white blood cells.
In the Kastle-Meyer presumptive blood test, which color indicates that blood is present?
Pink
Yellow
Blue
Gold
What happens when blood agglutinates (clots) in response to an anti-body?
Red blood cells are also called?
Leukocytes
Platelets
Erythrocytes
Lymphocytes
White blood cells are also called?
Leukocytes
Erythrocytes
Platelets
Lymphocytes
Help clot blood
Erythrocytes
Leukocytes
Platelets
Lymphocytes
This is the colorless liquid in which the components of blood are suspended...
red blood cells
platelets
plasma
white blood cells
A substance on the surface of red blood cells that can trigger the production of antibodies
agglutinates
antigens
anemia
Rh Factor
Platelets are also known as
Leukocytes
Erythrocytes
Thromobocytes
These field tests can be used to help identify stains as blood.
Plasma
Presumptive
Precipitin
What can happen if you receive the wrong blood type?
It changes your blood type.
You might need new white blood cells.
your cells will clump together and you could die.
You will get too much oxygen.
Chemicals in red blood cells that determine blood type.
antigens
antibodies
infections
inflammation
The Kastle-Meyer test is a _____________ blood test because it gives basic information in a short amount of time.
presumptive
definitive
confirmatory
positive
In the Kastle-Meyer presumptive blood test, which color indicates that blood is present?
Pink
Yellow
What is Agglutination?
The clumping of blood cells caused by an antigen-antibody reaction.
Proteins created by white blood cells that protect the body form antigens.
A foreign substance in the body that antibodies try to fight off.
The study of fluids.
What would happen if someone with type A blood gets a transfusion with type B blood?
The blood would not agglutinate and the person would be healthy.
The blood would agglutinate and person could die.
What indicator is used in the Kastle-Meyer test?
Luminol
Phenolphthalein
Hemastix
HermaTrace
Luminol would be considered a presumptive test for blood.
True
False
Blood typing cannot be used on dried blood.
True
False
o test whether or not a suspected stain is blood, an investigator could use the:
secretor test
Marquis test
Kastle-Meyer test
the precipitin test
The Kastle-Meyer test is a _____________ blood test because it gives basic information in a short amount of time.
presumptive
definitive
confirmatory
positive
Which of the following is the most common presumptive blood test that uses phenolphthalein which reacts with hemoglobin?
Luminol
Leucocrystal Violet
Kastle-Meyer
If a red blood cell has both A antigens and B antigens on its surface, what is its blood type?
A
B
AB
O
What is the blood type of #1?
A
B
AB
O
What is the blood type of #4?
A
B
AB
O
What is the blood type of #3?
A
B
AB
O
What is the blood type of #2?
A
B
AB
O
