Ch 3 Forensic Hair Analysis

Front

A human hair shaft is made mostly of a protein called _________.

Back

Keratin

Front

The atomic mass seen on the periodic table is not a whole number because it is a(n)____________ of the mass of all the isotopes of a given element.

Back

mean(average)

Front

A hair was found at a crime scene. After microscopic inspection it was found the hair had a diameter of 110 um and a medulla of 90 um. Determine the medullary index. (Give value to the hundredths place and abbreviation for units)

Back

.82 um

Front

________ is a chemical analysis that is used to separate components of a mixture. Gas and liquid are two forms of this process.

Back

Chromatography

Front

What is the primary function of hair in humans?

Back

Protection, regulation of body temperature, and sensory input.

Front

What are the three main phases of hair growth?

Back

Anagen, Catagen, and Telogen.

Front

What is the significance of the medullary index in forensic hair analysis?

Back

It helps to differentiate between human and animal hair.

Front

What is the role of melanin in hair?

Back

Melanin is responsible for the color of hair.

Front

Define isotopes in the context of forensic analysis.

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the purpose of using a microscope in hair analysis?

Back

To examine the physical characteristics of hair, such as diameter and medullary pattern.