Forensic Quiz 3

Question 1

Follicle

Answer 1

structure from hair originates and grows

Question 2

Hair Growth(anagen)

Answer 2

most active hair growth
85%
2-6 or 7 yrs

Question 3

Hair Growth(Catagen)

Answer 3

transition between hair growth and rest
3 weeks
1-2%

Question 4

Hair Growth(Telogen)

Answer 4

hair growth stops
3 months
10-14%

Question 5

Hair Color

Answer 5

special cells called melanocytes produces granules of melanin

Question 6

Melanin(1st Type)-Eumelanin

Answer 6

dark /brown/black

Question 7

Melanin(2nd Type)-Phacumelanin

Answer 7

light color/blonde

Question 8

Types of Melanin

Answer 8

under genetic influence theses two types of melanin are present in various combinations, densities and distributions(which gives rise to natural color

Question 9

Hair Treatment and Damage

Answer 9

Razor Cut-angled tip
Scissors cut-straight tip

Question 10

Human Hair

Answer 10

Interrupted,fragmented,absenton

Question 11

Non Human Hair

Answer 11

continoious

Question 12

hair cells

Answer 12

mitochondrial DNA is passed down by maternal lineage

Question 13

Medulla

Answer 13

makes the difference in hair texture/medulla patterns continuous fragmented and absent

Question 14

DNA analysis of Hair

Answer 14

hair cells do have there own type of DNA,contain mitochrondrial DNA

Question 15

Fibers can be important evidence because…

Answer 15

1. They may be easily transferred ex.sit on a chair, someone else sits on chair, those fibers get transferred
2. may have multiple transfers can help establish when events occur
   2.may have multiple fibers
   3.they are produced with a specific enduser in time
   4.come in a huge variety of colors. ex use in microscope

Question 16

Natural Fibers

Answer 16

fibers exist in nature as a fiber such as animals or plants like cotton silk wool or cashmere

Question 17

Synthetic Fibers

Answer 17

fibers manufactured from materials that are not fibers(man made),such as polyester,nylonS

Question 18

semi-synthetic fibers

Answer 18

made from a naturally occurring substance(have to process it more) such as bamboo, rayon and modal

Question 19

Fiber Morphology

Answer 19

A.type of fiber-most important characteristic(identify use microscopy
B.size of fiber
C.cross section
D.Color
E.Crimp-twist,reink,wave
F.Diameter
G.Delusterant(finely ground materials(titanium dioxide)
H.Refractive Index(n)
n=c(speed of light)/squareroot(speed of light medium)

Question 20

Chemical Analysis of Fiber

Answer 20

1.Fourier Transform Unfared Spectrophotometry(FTUR) Microscopy
2.Pyrolysis Gas Chromatography(PyGC)

Question 21

Fourier Transform Unfared Spectrophotometry

Answer 21

-non destructive to the evidence
-can determine broad class or subclass of fiber

Question 22

Pyrolysis Gas Chromatography

Answer 22

-destructive to evidence
-can distinguish closely related fibers because test is sensitive to small difference of chemical makeup of the fiber

Question 23

Dye

Answer 23

1.Thin Layer Chromatography-Dye(s) not identified, compare known dye to unknown dye
2.Liquid chromatography/massive spectrometry

Question 24

Drug

Answer 24

a substance designed to have specific physical and/or emotional effects on people/or animalss

Question 25

Licit Drugs

Answer 25

must have a recognized medical use as a defined by the FDA

Question 26

Illicit Drugs

Answer 26

abused(controlled substances)

Question 27

Licit Drugs Abuse

Answer 27

-absused/taken for purposes other than those for which were originally developed,use innapropriatly

Question 28

Types of Licit Drugs

Answer 28

1.Methaphetamine-legitamtly marketed as a stimulant to counter feelings of fatigue or depression as appetite suppressant or control hyperkensia 2.Steroids-drugs that mimic the actions of male sex hormones tester one,promote growth of cells especially muscle cells and maintain or increase the male physical characteristics

Question 29

Federal Drug Schedule

Answer 29

Schedule 1-no currently accepted medical use Schedule 2-use will potentially lead to severe psychological or physical dependency Schedule 3-ModeratePotential for Abuse Schedule 4-Low Potential for abuse Schedule 5-Low Potential for abuse

Question 30

Origins of Illicit Drugs

Answer 30

1.Naturally occurring substances ex.marijuana(canabis),cocaine(cocoa leaves),morphine(poppy seeds) 2.Derived from naturally occurring substances ex heroine-morphine,LSD-made from lysergic acid 3.Synthetic-made in labatories(man made) ex.methamphetamine,PCP(phencyclidine)

Question 31

Major Classification of Drugs-Stimulants

Answer 31

Boost persons mood and energy level to relieve symptoms of depression, stimulate people with fatigue depression,lethargy,street slang name-uppers ex.cocaine,methamphetimine(pseudephredine-decongestant),nicotine

Question 32

Major Classification of Drugs-Depressants

Answer 32

sedative effects, medically prescribed to relieve people with anxiety,nervousness,restlessness ex.barbituates(ex. pentobarbital,GHB,Rohyphol(date rape drugs)

Question 33

Hallucinogens

Answer 33

change users perceptions of reality and passing of time, audio/visual hallucinates ex.marijuana,ectasy,LSD,inhalants,PCP,psilocybin,peyote

Question 34

Narcotics

Answer 34

imprecisely defined and typically has negative sleep inducing,CNS depressant(brain and spinal cord) connotation(opiates,opium,opiods) ex.morphine,herion,fentanyl,methadone,oxydone

Question 35

Analysis of Illicit Drugs

Answer 35

A.Requirement of Drug Analysis -any conclusion must be reliable and defendable scientifically -must prove it to a degree of reasonable scientific certainty -standard of proof in court

Question 36

Schemes for Analysis of Drugs

Answer 36

1.Screening Test 2.Seperation Test-extract impurities 3.Confirmatory Test-mass spectrometer(positive identify substance)