True or False: Hair is composed of a protein called keratin which is responsible for keeping the hair strong and flexible.

True or False: All hairs on the head of a person are identical and contain similar color pigments and medulla patterns.

True or False: The cortex of the hair contains the hair’s pigment granules, called melanin, which are responsible for the hair’s color.

True or False: The anagen phase 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.

True or False: Chemical and nuclear tests, such as Neutron Activation Analysis, can identify and quantify drugs, toxins, and heavy metals in the body.

Which part of the hair is indicated on the diagram labeled A? The diagram shows a hair with four labeled regions: A at the upper external portion of the hair, B on the left side near the lower curve, C on the right side mid-shaft, and D near the base of the hair.

What part of the hair must be present to conduct a full DNA analysis?

Why is hair mostly considered class evidence?

Which part of the hair is shown in the micrograph with overlapping scale-like layers?

Which famous political leader’s hair analysis determined that he died from a poison called arsenic?

What is the medullary index of a hair where the width of the medulla is 1 micron and the width of the hair shaft is 3 microns?

True or False: The hair shown in the cuticle micrograph is a human hair.

A body was found in the woods. Hair on the body had gray ends and showed 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?

Hair analysis using a microscope may be used to determine all of the following except:

The main function of hair is to _____.

Which type of medulla pattern is represented by a dashed, spaced line through the center of the hair?

Which of the following is a microscopic property of hair?

Which part of the hair shaft is represented by letter A on the cross-sectional diagram? The diagram shows three labeled layers of the hair shaft: A as the outermost layer, B as the middle region, and C as the central core.

Which part of the hair is indicated on the diagram as part C? The diagram shows a whole hair with four labels: A at the upper external portion, B on the lower left, C on the right side mid-shaft, and D near the base.

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?

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?