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Hair Review

Total questions: 81

Worksheet time: 38mins

Name
Class
Date
1.
The central core of the hair is called the...?
a)
Medulla
b)
Cuticle
c)
Cortex
d)
Shaft
2.

The tough clear outside layer is the

a)

cuticle

b)

cortex

c)

medulla

d)

polymer

3.

Cortex

a)

Outside covering of hair

b)

Deepest layer of hair containing large cells and air spaces

c)

The middle layer which provides the hair with its strength

d)

Muscle attached to the hair follicle.

4.

A

a)

Cuticle

b)

Hair Follicle

c)

Cortex

d)

Medulla

5.

D

a)

Cuticle

b)

medulla

c)

Hair Bulb

d)

Cortex

6.

B

a)

Cuticle

b)

Hair Follicle

c)

medulla

d)

Cortex

7.

C

a)

Cuticle

b)

Medulla

c)

Hair Bulb

d)

Cortex

8.
The central core of the hair is called the...?
a)
Medulla
b)
Cuticle
c)
Cortex
d)
Shaft
9.
Hair with a round cross section and a large diameter is classified as...?
a)
Asian
b)
African
c)
European
10.
Which gland secretes oil and causes hair to be oily?
a)
Sebaceous
b)
Adrenal
c)
Pineal
d)
Eccrine
11.
Hair analysis may be used to determine all of the following except:
a)
manner in which the hair was removed
b)
body region from which the hair came from
c)
broad racial background of the individual from which the hair came from
d)
identity of the individual from which the hair came from
12.
The main purpose of hair is to:
a)
Protect against sunlight
b)
Decrease friction
c)
Aid in sensory
d)
Regulate body temperature
13.
Rodent and bat hair has which type of cuticle?
a)
imbricate
b)
spinous 
c)
coronal
d)
elongate
14.
The transitional or regressive stage that lasts a few weeks during which hair growth slows is called...?
a)
Anagen
b)
Telogen
c)
Catagen
d)
Metagen
15.
The hair follicle is dormant and hairs are easily lost during which stage of the hair life cycle?
a)
Anagen
b)
Telogen
c)
Catagen
d)
Metagen
16.
We know hair is from a human if…
a)
The medullary index is 0.5 or greater           
b)
The medullary index is 0.33 or less
c)
The cuticle is coronal
d)
The medulla is fragmented
17.
Small sacs of air found within the cortex are called...?
a)
central embolism
b)
cortical fusi 
c)
air granules
d)
oval bodies
18.
The hair shaft is composed of what important protein?
a)
Cellulose 
b)
Chitin
c)
Peptidoglycan
d)
Keratin
19.
When collecting hairs from a suspect to compare to those found at a crime scene, how   many control hairs should be collected?
a)
100 from all over the body
b)
50 from head; 25 from pubic region
c)
75 from head; 25 from pubic region
d)
25 from head; 75 from arms, legs, and pubic region
20.
The following medulla pattern is called
a)
fragmented 
b)
continuous
c)
interrupted
21.

Hair is what type of evidence?

a)

Class

b)

Individual

c)

unknown

d)

all of the above

22.

What are the tree stages of hair growth in order from start to end?

a)

Anagen, telogen, and catagen

b)

anagen, catagen, and telogen

c)

telogen, catagen, and anagen

d)

catagen, telogen, and anagen

23.

Humans lose approximately how many head hairs per day?

a)

100

b)

1000

c)

50

d)

5

24.

What type of medulla pattern is shown here?

a)

interrupted

b)

fragmented

c)

stacked

d)

not visible

25.

What are the three cuticle patterns?

a)

Coronal, spinous, imbricate

b)

flowery, circular, triangular

c)

square, round, diamond

26.

When processing hair found at a crime scene, we must determine if the origin is:

a)

human or animal

b)

human or reptile

c)

reptile or mammal

d)

human or alien

27.

What types of DNA can be found on the hair?

a)

Mitochondrial

b)

nuclear

c)

Both mitochondrial and nuclear

d)

none

28.

What stage of hair growth is this hair in?

a)

Anagen phase

b)

Catagen phase

c)

Telogen Phase

d)

Can not be determined

29.

What does a damaged hair root tell investigators?

a)

The hair was forcefully removed.

b)

The suspect was attacked.

c)

There was a struggle.

d)

The hair fell out of the person's head.

30.

What cuticle type is in the picture?

a)

Coronal

b)

Imbricate

c)

Spinous

31.

Which of the following hair types has an oval cross section?

a)

Caucasian

b)

African

c)

Asian

d)

None of the above

32.

Which of the following hair types has densely distributed pigment granules?

a)

Caucasian

b)

African

c)

Asian

d)

None of the above

33.
In order to determine if a hair is from an animal or human, one should divide the diameter of the...
a)
medulla by the entire hair
b)
medulla by the cortex
c)
cortex by the medulla
d)
cortex by the entire hair
34.
Hair is helpful in solving old crimes because…
a)
hair on a suspect never changes
b)
hair always contains DNA evidence
c)
hair takes little room to store in evidence closets
d)
hair does not easily decompose
35.
Diameter of the medulla is 0.2 and diameter of the hair is 0.4.  What is the medullary index?
a)
2.5
b)
0.5
c)
0.1
d)
cannot be determined
36.
What must be present in a hair sample to obtain nuclear DNA?
a)
keratin
b)
drop of blood 
c)
healthy cuticle
d)
follicular tag
37.

How can you tell the difference between animal and human hair?

a)

Human is imbricate and animal is always spinous.

b)

Human medullary index is less than animal.

c)

Human hair is thinner than animal hair

d)

Animal hair has a thicker cortex than human.

38.

If a hair were a pencil, which structure corresponds to the paint on the surface?

a)
Follicle
b)
Cortex
c)
Cuticle
d)
Medulla
39.

If a hair were a pencil, which structure corresponds to the wood?

a)
Follicle
b)
Cortex
c)
Cuticle
d)
Medulla
40.

If a hair were a pencil, which structure corresponds to the lead?

a)
Follicle
b)
Cortex
c)
Cuticle
d)
Medulla
41.
What is the purpose of the arrector pili muscle?
a)
cause hair to stand up
b)
stimulate the growth of new cells
c)
shed the hair naturally
d)
hold the hair in place
42.
The _____ supplies nutrients through blood vessels and is located at the bottom of the follicle.
a)
hair bulb
b)
hair papilla
c)
hair shaft
d)
medulla
43.
Which scale pattern identifies human hair?
a)
Imbricate
b)
Coronal
c)
Spinous
d)
None of these
44.
We know hair is from a human if…
a)
The medullary index is 0.5 or greater           
b)
The medullary index is 0.33 or less
c)
The cuticle is coronal
d)
The medulla is fragmented
45.
What kind of medulla is this?
a)
Fragmented
b)
Continuous
c)
Interrupted/Intermittent
d)
There is no medulla - Absent
46.

Cuticle Pattern

a)

Imbricate

b)

Coronal

c)

Spinous

47.

Cuticle Pattern

a)

Imbricate

b)

Coronal

c)

Spinous

48.

To determine the medullary index, you would ______.

a)

measure the diameter of the medulla and divide it by the diameter of the hair

b)

measure the diameter of the hair and add it to the diameter of the medulla

c)

measure the length of the medulla and divide it by the length of the hair

d)

measure the diameter of the medulla and multiply it by the diameter of the cortex

49.

The bottom portion of hair in which nuclear DNA can be found.

a)

Medulla

b)

Root

c)

Cuticle

d)

Cortex

50.
The melanin that gives black and brown color to hair is:
a)
primary
b)
eumelanin
c)
pigment
d)
pheomelanin
51.

What type of melanin gives blond and red colors to the hair?

a)

Primary

b)

Eumelanin

c)

Pigment

d)

Pheomelanin

52.
A microscope that views side by side images of hair samples is called...?
a)
Fluorescence microscope
b)
Electron microscope
c)
Comparison microscope
d)
Compound microscope
53.
The technique that can identify up to 14 different elements in a single   strand of human hair is...?
a)
Mass Spectrometry
b)
Neutron Activation Analysis
c)
Gel Electrophoresis
d)
Fractional Distillation Analysis
54.
The network of blood vessels that supply the nutrients to feed the hair and help it grow is...?
a)
Medulla
b)
Papilla
c)
Cortical fusi 
d)
Follicle
55.
How often does a full head of hair get replaced?
a)
Every year
b)
Every other year
c)
Every third year
d)
Every four years
56.
What tool was used to cut the hair shown in this picture?
a)
Clippers
b)
Razor
c)
Scissors
d)
Uncut
57.
People with different colors of hair tend to have different amounts of hair. Individuals with which hair color tend to have the most hair?
a)
Blonde
b)
Brunette
c)
Red
d)
Gray
58.
After getting up from your desk chair, you see that you transferred one of your hairs to the chair. This is an example of what?
a)
Primary Transfer
b)
Secondary Transfer
c)
Tertiary Transfer
d)
Quaternary Transfer
59.
Human hairs generally have what two types of medulla?
a)
Continuous or interrupted
b)
Fragmented or none
c)
Solid or interrupted
d)
Fragmented or solid
60.
The average hair grows how much per month?
a)
1.3 cm
b)
2.4 cm
c)
.5 cm
d)
3.2 cm
61.
What is the first step in testing the hair shaft for substances such as drugs?
a)
washing the hair
b)
dissolving the hair
c)
bleaching the hair 
d)
burning the hair
62.
The best method to pick up hairs over a large surface area is...?
a)
gloves
b)
forceps
c)
tape lift
d)
vacuum
63.
What tool was used to cut the hair shown in this picture?
a)
Clippers
b)
Razor
c)
Scissors
d)
Uncut
64.
Uncut, scissors, razor, and clippers all give unique shapes to what part of a hair?
a)
Cuticle
b)
Shaft
c)
Follicular tag
d)
Distal tip
65.
Why type of medulla is frequently found in the hairs of Native Americans and Asians?
a)
Continuous
b)
Interrupted
c)
Fragmented
d)
Solid
66.
What tool was used to cut the hair shown in this picture?
a)
Clippers
b)
Razor
c)
Scissors
d)
Uncut
67.
Bleaching hair removes pigment granules and gives hair a...
a)
Shiny cuticle
b)
Dark cortex
c)
Yellow tint
d)
Grey shadow
68.
In many mammals, hair can be very dense, and it is then referred to as:
a)
Coat
b)
Fur
c)
Pelt
d)
Down
69.
How long does it take for newly cut hairs to take on an uncut, rounded shape?
a)
4-5 days
b)
2-3 weeks
c)
1 month
d)
3 months
70.

In the diagram above which letter would indicate the hair shaft?

a)

A

b)

B

c)

C

d)

D

e)

E

71.

In the diagram above, which letter would indicate the follicle?

a)

A

b)

B

c)

C

d)

D

e)

E

72.

In the diagram above which letter would indicate the root?

a)

A

b)

B

c)

C

d)

D

e)

E

73.

The medulla pattern shown would be

a)

absent

b)

continuous

c)

interrupted

d)

fragmented

74.

Since hair grows out of the skin, chemicals that the skin absorbs can become incorporated into hair. Ingested or absorbed toxins can be detected by chemical analyses of hair. These ingested or absorbed toxins include:

a)

arsenic

b)

lead

c)

drugs

d)

All of these choices

75.

Many dyes and other hair treatments will fluoresce under a certain color (wavelength) of light. In a fluorescence microscope, a beam of light of a certain wavelength is used. If the sample contains particular chemicals, it will absorb some of the light and then reemit light of a different wavelength. This is called:

a)

fluorescence

b)

effervescence

c)

incandescence

d)

None of these choices

76.
Mr. Geandaromohajotoda, a new teacher of only 3 months, was fired yesterday from Toms Brick High School for suspected drug use during employment.   The hair analysis showed traces of THC at a length of 5.6 cm from the root.  Was his firing justifiable? 
a)
Yes, he was clearly using drugs over the last 3 months.
b)
No, he has not used drugs for just over 3 months.
c)
Yes, he was using 1 month ago.
d)
No, he hasn't used drugs for 5 months.
77.

What type of microscope can provide incredible detail of the surface or interior of the sample, magnifying the object 50,000 times or more?

a)

comparison microscope

b)

compound microscope

c)

electron microscope

d)

flourescence microscope

78.

Curly hair has what type of cross-section?

a)

flattened

b)

round

c)

oval

d)

triangular

79.

What happens to hair density and number of hair follicles as a person ages?

a)

Stays the same

b)

Decreases

c)

Increases

d)

gets eliminated

80.

Secondary transfer is common with what type of hair evidence?

a)

animal

b)

eumelanin

c)

anagen

d)

human

81.

Package used to hold hair evidence

a)

cuticle

b)

paper bindle

c)

cortex

d)

wrapping

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