FRSC365 EXAM 3 QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS VERIFIED GRADED A++
how do you complete a hair analysis?
compare the sample hair to known suspect hairs
what are you determining in a hair analysis?
hair or fiber?
animal or human?
if animal, what species?
if a hair is human, what are you determining?
color, race, body region, growth phase (forcibly removed, PCR suitable)
what are the three major components of the hair shaft?
medulla, cortex, cuticle
what muscle makes the hair stand up on your arms?
arrector pilli muscle
starting from the outside in, what's the order of anatomical structures in the hair
shaft?
cuticle, cortex, medulla
what is present in the cuticle of a hair shaft?
, scales
what are the characteristics of the cuticle?
relative thickness, scale pattern
how can you determine the scale pattern of the cuticle?
scale cast
how do you do a scale cast?
pour clear nail polish on a slide, lay the hair on it, let the polish dry, then examine the
"cast"
what are the three types of cuticles?
coronal, spinous, and imbricate
what does a coronal cuticle look like?
crown-like, cups stacked on top of each other
what does a spinous cuticle look like?
petal-like
what does an imbricate cuticle look like?
irregular
what kind of cuticle can humans only have?
imbricate
what is the main component that's examined in the cortex?
SOLUTIONS VERIFIED GRADED A++
how do you complete a hair analysis?
compare the sample hair to known suspect hairs
what are you determining in a hair analysis?
hair or fiber?
animal or human?
if animal, what species?
if a hair is human, what are you determining?
color, race, body region, growth phase (forcibly removed, PCR suitable)
what are the three major components of the hair shaft?
medulla, cortex, cuticle
what muscle makes the hair stand up on your arms?
arrector pilli muscle
starting from the outside in, what's the order of anatomical structures in the hair
shaft?
cuticle, cortex, medulla
what is present in the cuticle of a hair shaft?
, scales
what are the characteristics of the cuticle?
relative thickness, scale pattern
how can you determine the scale pattern of the cuticle?
scale cast
how do you do a scale cast?
pour clear nail polish on a slide, lay the hair on it, let the polish dry, then examine the
"cast"
what are the three types of cuticles?
coronal, spinous, and imbricate
what does a coronal cuticle look like?
crown-like, cups stacked on top of each other
what does a spinous cuticle look like?
petal-like
what does an imbricate cuticle look like?
irregular
what kind of cuticle can humans only have?
imbricate
what is the main component that's examined in the cortex?
