Macro or Micro
Is the cuticle microscopic or macroscopic?
microscopic
What is the medulla?
The center of the hair shaft.
Who was the famous political leader that hair analysis determined that he died from a poison called arsenic
Napoleon Bonaparte
What does macroscopic mean?
Big enough to be seen with just your eyes.
What is the protein that helps make hair strong?
Keratin
Is the length of hair microscopic or macroscopic?
macroscopic
What part of the hair is the transparent outer layer of the hair?
The Cuticle
How many strands of hair were used to test for arsenic levels in our reading?
5 strands of hair.
What are the three functions of hair?
Temperature regulation, protects skin, and act as a sensory organ
If the medullary index is greater than 0.5 is it human or animal hair?
animal
Is the color of hair microscopic or macroscopic?
macroscopic.
What part of the hair must be present in order to conduct a full DNA analysis?
The follicle
What does NAA stand for?
Neutron Activation Analysis
Name one of the 4 types of medulla patterns.
Absent, continuous, interrupted, fragmental
Suppose this sample of hair has a diameter of 110 microns and has a medulla that measures 58 microns. What is the medullary index of hair?
0.53
Is the cortex microscopic or macroscopic?
What part of the hair is made up of scales that overlap?
The cuticle.
Who is known as the pioneer of forensic science?
Dr. Edmond Locard
When is hair considered class evidence?
when there is no follicle
True or False: The cortex of the hair contains pigment (color).
True
What does microscopic mean?
too small to be seen with just eyes. Need a microscope to help see.
List one fact from the notes about the cortex.
Middle part of the shaft
Makes up the largest part (what you will most likely see under our microscopes)
Contains most of the pigment (melanin) that give hair its color.
What did they originally think the person in our reading died of?
Carcinoma of the stomach (stomach cancer)
What is the formula to find the medullary index?
The width of medulla divided by the diameter of the hair
Medulla diameter: 31 microns Cortex diameter: 93 microns. What is the medullary index?
0.33