Hair and Fiber Review

Wool is a type of:

• Animal Fiber

• Plant Fiber

• Synthetic Fiber

What needs to be present on a hair sample in order for it to be considered individual evidence?

• Complete hair shaft

• Continuous medulla

• Hair follicle

• Cuticle

Correctly the structures depicted on the following pictures - Position C

• Hair Shaft

• Hair Cuticle

• Medulla

• Cortex

Correctly the structures depicted on the following pictures - Position E

• Hair Shaft

• Hair Cuticle

• Medulla

• Cortex

Correctly the structures depicted on the following pictures - Position D

• Hair Shaft

• Hair Cuticle

• Medulla

• Cortex

The shiny nature of silk is due to
 

• its hollow core

• its smooth, round fibers

• mucus secretions from the silkworm

• its ability to reflect light

The main functions of hair:

• Regulate body temperature

• Protect against harm

• Social interactions

• All of the above

Fibers are an excellent source of trace evidence because:

• they are easily transferred from victim to suspect

• they are often overlooked by a suspect

• they can be easily collected and stored

• all of the answers are correct

Two methods of determining different fiber types include:

• cuticle analysis and burning

• microscopic observation and mitochondrial analysis

• chemical testing and burning

• thermal decomposition and gel electrophoresis

The hair shaft is composed of the cuticle, cortex, and

• medulla

• root

• crown

• granules