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PLTW Biomed Exam (2)
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PLTW Biomed Exam (2)
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PLTW Biomed Exampolygraph test - ANS-lie detector test
Testable hypothesis contains a ? - ANS-Experimental and constant variable
Arch loop and whirls have how many deltas - ANS-0 1 and 2
What is a control? - ANS-standard for comparison
Located exchange principle - ANS-Every contact leaves a trace
Define fingerprint minutiae: - ANS-Tiny fingerprint details
How many munutiae must you have to have a match in fingerprint - ANS-10-15 mostly 12
How can digital evidence be used in crime investigations? - ANS-Location searches
communications and transactions
Four components of blood and their function - ANS-plasma- liquid portion Carries protein
red blood cells-erythrocytes(carry oxy)
white blood cells-leukocytes (immune)
platelets-thrombocytes (clotting)
Presumptive vs. Confirmatory Tests - ANS-Presumptive - may be this(kastl Meyer)
Confirmatory- it is this (blood type)
antigens vs antibodies - ANS-Antibodies bind to antigens
Antigen cause Immune response
How do angle and height affect blood spatter? - ANS-Angle= tail length
Height = diameter
What are the three components of a nucleotide? - ANS-Dioxyribose, phosphate, nitrogenous
base
How do the bases of dna stick together? - ANS-A=t g=c through hydrogen bonds
Gene - ANS-A segment of DNA on a chromosome that codes for protein
Chrimosome - ANS-Super coiled linear Piece of dna
, Relationship between DNA genes and chromosomes - ANS-Chromosomes make up genes and
genes make up DNA
Eukaryotic - ANS-Has a nucleus
Prokaryotic - ANS-No nucleus
PCR steps - ANS-polymerase chain reaction
Restriction enzymes - ANS-enzyme that cuts DNA at a sequence of nucleotides
Gel electrophoresis - ANS-The separation of nucleic acids or proteins, on the basis of their size
and electrical charge, by measuring their rate of movement through an electrical field in a gel.
During electrophoresis in which direction do the dna fragments move and why - ANS-Towards
the positive
Which fragments move through the gel faster? - ANS-The small ones
Cause of death - ANS-The specific injury, trauma, or disease that directly caused the victim's
death
Manner of death - ANS-How death occurred; 5 possibilities
- natural
-accidental
-suicide
-homicide
-undetermined
mechanism of death - ANS-What happens physiologically (inside the body) to result in death
Bladder - ANS-urinary system
pituitary gland - ANS-Endocrine system
Pancreas - ANS-digestive system
livor mortis - ANS-The pooling of the blood in tissues after death resulting
Rigor mortis - ANS-the stiffening of the body after death
Example of a cell - ANS-red blood cell
Tissue example - ANS-muscle tissue
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