body fluid evidence (blood) Flashcards

1
Q

what four things make up blood?

A

red blood cells
white blood cells
plasma
platelets

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2
Q

the average adult has about … liters of blood inside of them and that blood makes up …% of their body weight

A

5
7-8%

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3
Q

true or false… is blood a living tissue?

A

true

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4
Q

how many red blood cells are there in 2-3 blood drops

A

about one billion

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5
Q

for every … rbcs, there are … platels and … white blood cells

A

600
40
1

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6
Q

how many days can a rbc live for?

A

120 days

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7
Q

under low oxygen conditions the body makes more red blood cells. what can this determine?

A

elevation and location of the person

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8
Q

which organism has rbcs with no nucleus?

A

humans and other mammals

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9
Q

which organisms have rbcs with a nucleus

A

birds, reptiles, and lower invertebrates

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10
Q

what are the three blood alleles?

A

A, B, and O

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11
Q

what are the six possible blood combinations?

A

AA, AO, BB, BO, AB OO

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12
Q

what would happen if a RH- mother had an RH+ baby?

A

the mother would build antibodies against the RH+ and the second baby would get hemolytic disease

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13
Q

what agglutinogens (sprinkles) and agglutinin does type A have?

A

A
b

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14
Q

what agglutinogens (sprinkles) and agglutinin does type B have?

A

B
a

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15
Q

what agglutinogens (sprinkles) and agglutinin does type AB have?

A

A and B
none

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16
Q

what agglutinogens (sprinkles) and agglutinin does type O have?

A

none
a and b

17
Q

with RH, what does (-) and (+) mean?

A

(-) does not have the protein
(+) does have the protein

18
Q

what are the eight blood types?

A

A+, A-
B+, B-
AB+, AB-
O+, O-

19
Q

who invented the early stages of blood typing and found the different types of blood?

A

Karl Landsteiner

20
Q

which blood type is the universal doner?
recipient?

A

type O (O-)
type AB (AB+)

21
Q

what are the three blood types anx what do they determine?

A

blood samples: blood type and DNA

blood droplets: location, movement of victim, and weapon

blood spatter: patterns

22
Q

what is the kastle meyer test?

A

a test used to determine whether a substance is blood or not

23
Q

what is the luminol test?

A

used to make cleaned up blood visible

24
Q

what can blood pattern analysis tell?

A

number of blows
perpetrator left or right handed
position and movement
which wounds were inflicted first
type of injuries
age of crime
was death immediate or delayed?

25
Q

what is a spatter?

A

blood stains created from the application of force to the origin of source

26
Q

what is the origin of source?

A

where the blood spatter came from/originated

27
Q

what is the angle of impact?

A

the angle at which a droplet strikes a surface

28
Q

what is a parent drop?

A

the droplets from which a satellite spatters

29
Q

what is a satellite spatter?

A

small drops that break from the parent spatter when it hits a surface

30
Q

what is a spine?

A

a pointed edge of a stain: can help determine direction of travel

31
Q

what are the four blood stain patterns?

A

passive, projected, transfer, free falling