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Forensic Chemistry And Toxicology > Blood > Flashcards

Blood Flashcards

1
Q

.Has been called the circulating tissue of the body.
. It is referred to as highly complex mixtures of cells enzymes, proteins, and inorganic substances.
. It is the red fluid of the blood vessels. blood is opaque

A

Blood

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2
Q

Composition of blood

A

Plasma 55%
Red blood cells (erythrocytes) 45%
White blood cells (leukocytes)
Platelets (thrombocytes)
Buffy coat 1%.

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3
Q

The fluid or liquid portion of blood where the cells are suspended

A

Plasma

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4
Q

The yellowish fluid of blood in which numerous blood corpuscles are suspended.
. A straw-yellow liquid formed when blood to which oxalate has been added to prevent clotting is allowed to strand.

A

Plasma

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5
Q

A straw yellow liquid formed when clotted blood is allowed to stand for sometime and the clot contracts.

A

Serum

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6
Q

Problems in the study of blood

A
  1. Where has to be searched for
  2. Collection, preservation, packing and transportation of specimens suspected to contain blood.
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7
Q

Four test or examination of blood

A

Preliminary test
Confirmatory test
Precipitate test
Blood grouping test

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8
Q

Determine whether the stains contains blood or another substance. Determines whether visible stains do or do not contain blood. It is used to demonstrate the presence of blood.

A

Preliminary test

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9
Q

Determines whether blood stains really contains blood. Test that positively identifies blood.

A

Confirmatory test

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10
Q

Determines whether blood is a human or non-human origin, and if non-human, the specific animal family from which it originated.

A

Precipitatin test

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11
Q

Determines the blood group of human

A

Blood grouping test

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12
Q

Five preliminary test for blood

A

Benzidine test or benzidine color test
Phenolphthalein test
Guaiacum test
Leucomalachite green test
Luminol test

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13
Q

An extremely sensitive test that can be applied to minutes stain
. Commonly used preliminary test for blood
. Never fails to detect blood even when very old
Decomposed stain with all sorts of contamination is examined

A

Benzidine test

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14
Q

An alternative test to benzene test
. Can detect blood in a delusion of 1:80,000,000 parts
Positive results with the test is highly indicative of blood

A

Phenolphthalein test

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15
Q

A fairly delicate test showing the presence of fresh blood in a solution of 1:50,000 dilution
. May not react to very old stains.

A

Guaiacum test

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16
Q

Not as sensitive as benzadine test

A

Leucomalachite green test

17
Q

Important presumptive identification test for blood
. Result in the production of light rather than color
. Is extremely sensitive test
. Capable of detecting blood stains diluted up to 10,000 times
. Is known to destroy many important blood factors necessary for the forensic characterization of blood, so it’s used should be limited only seeking out blood and visible to the naked eye.

A

Luminous test

18
Q

Three confirmatory test for blood

A

Microscopic test
Microchemical or mocrocrystalline test
Spectroscope test

19
Q

Useful for the demonstration and mensuration of blood corpuscles for making the distinction between mammalian avian and reptilian blood and for the investigation
. In short it differentiates mammalian avian and reptilian blood

A

Microscopic test

20
Q

One of the two popular microchemical test
. Delicate test for the presence of hemoglobin

A

Takayama test

21
Q

Almost delicate and reliable test for the determination of the presence of blood in both old and recent stains
. Is performed by means of an optical instrument known as spectroscope

A

Spectroscopic examination

22
Q

Four group of blood

A

Group o
Group a
Group b
Group ab

23
Q

Complex chemical unit in the chromosomes by which hereditary characters are transmitted
. Occurs in pair

A

Genes

24
Q

Term used to denote the expression of the inherited characteristic as found in the individual

A

Phenotypes

25
Q

Are paired genes

A

Genotypes

26
Q

Enzyme that accelerates the oxidation several classes of organic compounds by peroxide

A

Peroxidase

27
Q

The red coloring matter of the red blood cells of the blood

A

Hemoglobin

Forensic Chemistry And Toxicology (4 decks)

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