FRSC 365 TEST 3 EXAM DETAILED QUESTIONS AND VERIFIED
CORRECT ANSWERS GRADED A++
what is the outermost section of a hair shaft called
cuticle
what is the core of a hair shaft called
medulla
what are the 3 cuticle patterns and what do they resemble
coronal (crown), spinous (petal), imbricate (irregular)
in what section of the hair shaft is pigment found
cortex
what are the 2 types of pigmentation in a cortex and what is their appearance
eumelanin: brown/black
pheomelanin: yellow/red
what are the 4 classifications of a medulla
absent, continuous, discontinuous, fragmentary
what race often has a thicker cuticle
asian
what is the main difference between the medullas of an animal vs a human
in animals, the medulla will be thicker
what are the 3 types of animal hair
, - fur hair (fine)
- guard hair (thicker)
- tactile (whiskers)
which type of animal hair is used to identify a species
guard hair
what are the 3 hair growth stages and what is going on in each stage
- anagen: growth
- catagen: transitional phase
- telogen: resting
describe the root of a hair in anagen phase
bent pointed root
describe the root of a hair in catagen phase
ball point root
describe the root of a hair in telogen phase
rounded root
2 requirements for pcr analysis of a hair
root must be present and contain follicular tissue
How to determine if a hair was forcibly removed
if the root has a club shape
what are the 2 different types of condensers used specifically for dark field
cardioid and paraboloid
what are the 3 markings that can tell you an objective lens is meant for dark field
df, bfdf, neo
CORRECT ANSWERS GRADED A++
what is the outermost section of a hair shaft called
cuticle
what is the core of a hair shaft called
medulla
what are the 3 cuticle patterns and what do they resemble
coronal (crown), spinous (petal), imbricate (irregular)
in what section of the hair shaft is pigment found
cortex
what are the 2 types of pigmentation in a cortex and what is their appearance
eumelanin: brown/black
pheomelanin: yellow/red
what are the 4 classifications of a medulla
absent, continuous, discontinuous, fragmentary
what race often has a thicker cuticle
asian
what is the main difference between the medullas of an animal vs a human
in animals, the medulla will be thicker
what are the 3 types of animal hair
, - fur hair (fine)
- guard hair (thicker)
- tactile (whiskers)
which type of animal hair is used to identify a species
guard hair
what are the 3 hair growth stages and what is going on in each stage
- anagen: growth
- catagen: transitional phase
- telogen: resting
describe the root of a hair in anagen phase
bent pointed root
describe the root of a hair in catagen phase
ball point root
describe the root of a hair in telogen phase
rounded root
2 requirements for pcr analysis of a hair
root must be present and contain follicular tissue
How to determine if a hair was forcibly removed
if the root has a club shape
what are the 2 different types of condensers used specifically for dark field
cardioid and paraboloid
what are the 3 markings that can tell you an objective lens is meant for dark field
df, bfdf, neo
