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Exam 3: Hair Analysis

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Question 1

Multiple Choice

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When humans are born, they have about:

A) 5 million hair follicles, only two percent of which are on the head.
B) 10 million hair follicles, only two percent of which are on the head.
C) 5 million hair follicles, only five percent of which are on the head.
D) 10 million hair follicles, only five percent of which are on the head.

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Question 2

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Hair can adhere to clothes, carpets and many other surfaces and be transferred to other locations.This is called:

A) secondary transfer.
B) primary transfer.
C) tertiary transfer.
D) redundant transfer.

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Question 3

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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 hair consists of two parts: a follicle and a shaft.

In humans, the cortex is the largest part of the hair shaft.

The hair shaft is made up of three layers: an outer medulla, a cortex, and an inner cuticle.

The rate of hair growth is important to know because it can help determine the last time hair was chemically treated.Human hair grows at which rate:

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:

In 1910 a comprehensive study of hair titled The Hair of Man and Animals was published by the French forensic scientists, Victor Balthazard and Marcelle Lambert.This text includes numerous microscopic studies of hair from:

Investigators recognized the importance of analysis of hair as:

Bits of pigment found in the cortex of a hair is called melanin granules.

Animal hair and human hair have several differences including:

Hair proceeds through __________________ stages as it develops.

A classic 1883 text on forensic science, The Principles and Practice of Medical Jurisprudence by Alfred Swaine Taylor and Thomas Stevenson contains a chapter on using:

Hair viewed for forensic investigations is studied both macroscopically and microscopically.Microscopic characteristics include the:

The region of a hair located outside of the medulla containing granules of pigment is called:

A type of protein made up of a chain of amino acids that makes hair both strong and flexible is:

The cuticle of human hair is described as ____________________________________ .

Whenever two objects are in contact, some transfer of material will occur.This is known as____________________________________________________.

Forensic scientists distinguish __________________ types of hair on the human body.