Follicle
Shaft
Cortex
Cuticle
Surprise
100
The shaft of the hair (without the presence of the follicle) is considered ______ evidence.
Class
100
Hair is composed of a protein called ______ which is responsible for keeping the hair strong and flexible.
Keratin
100
All hairs on the head of a person are identical and contain similar color pigments and medulla patterns.
True or False
False
100
The ________ of the hair contains the hair’s pigment granules, called melanin, which are responsible for the hair’s color.
DOUBLE
Cortex
100
List the five types of hair on the human body.
head
body
pubic
eyebrows/eyelashes
beard
200
What part of the hair must be present to conduct a full DNA analysis?
Follicle
200
Which part of the hair is shown below?
Cuticle
200
Which famous political leader’s hair analysis determined that he died from a poison called arsenic?
Napoleon
200
The image below shows the three growth phases of hair. Stage A represents a hair that is in active growth. What is the correct term for this stage?
Anagen
200
Hair can adhere to clothes, carpets and many other surfaces and be transferred to other locations. This is called:
Secondary Transfer
300
Which part of the hair is indicated on the diagram below as part A?
Shaft
300
Hair analysis using a microscope may be used to determine all of the following except:
- body region from which the hair came from
- identity of the individual from which the hair came from
- broad racial background/ethnicity
- manner in which the hair was removed
Identity of the individual from which the hair came from
300
Which type of medulla pattern in represented in the image:
Interrupted
300
A 37-year-old Asian male was found deceased in a wooded area about 1 mile from the victim’s home. Investigators recovered several hairs on the victim’s body. Forensic lab analysis determined that the medullary index of the hairs measured 0.67. What can be concluded from this information? DOUBLE
The hairs recovered are not human hair.
300
Bits of pigment found in the _______ of a hair is called melanin granules.
Cortex and Medulla
Cortex
400
The medullary index is 0.33 microns. Is the hair human or animal?
Human
400
List three functions of hair:
protect the skin
act as a sensory organ
regulate body temperature
400
Width of medulla/Diameter of hair
medullary index formula
400
Cortex
400
When humans are born, they have about __ million hair follicles, only __ percent of which are on the head.
5 million
2 percent
500
Chemical and nuclear tests, such as ______, can identify and quantify drugs, toxins, and heavy metals in the body.
NAA
Nuclear Activation Analysis
500
What is the medullary index of the hair shown below? The width of the medulla is 1 micron, and the width of the hair shaft is 3 microns.
DOUBLE
0.3 microns
500
The ________ _________of hair is the resting stage of the hair growth cycle, where the hair follicle is inactive, and the hair essentially stops growing before eventually shedding to make way for a new hair to grow in its place.
telogen phase
500
The body of a woman was found in the woods. Some hair fibers found on the body were sent to the crime lab for analysis. The ends of the hair attached to the body were gray but showed that it had been dyed. The distance from the root of the hair to the beginning of the dyed area measured 8 mm. Investigators determined that the victim’s hair had last been dyed on August 1, 2004. Assuming the hair grows at a rate of 0.44 mm per day, approximately what date did the woman die? DOUBLE
August 19, 2004
500
Animal hair and human hair have several differences including:
the pattern of pigmentation.
the medullary index.
the cuticle type.
All of these choices.
All of these