Vocabulary 1 "Blood Evidence"

Question 1

Erythrocytes (red blood cell)

Answer 1

Hemoglobin-rich, red blood cells that transport oxygen through a body. Erythrocytes give the red color to vertebrate blood and do not have nuclei.

Question 2

Leukocytes (white blood cell)

Answer 2

One of the many cells in the blood that lack hemoglobin but have a nucleus and are active in the immune response. Lymphocytes, monocytes, neutrophils, eosinophils, and basophils are leucocytes.

Question 3

Thrombocytes (platelet)

Answer 3

A minute, colorless, anucleate disk-like body of mammalian blood that assists in blood clotting by adhering to other platelets and damaged epithelium.

Question 4

Plasma

Answer 4

The pale yellow, liquid portion of blood that consists of water and dissolved substances, including sugars, lipids, metabolic waste products, amino acids, hormones, and vitamins.

Question 5

Hemoglobin

Answer 5

A protein found in red blood cells that transports oxygen.

Question 6

Presumptive Test

Answer 6

the initial testing that suggests a sample may be blood.

Done on feild to see if red subastnce is blood then confirmatory test later in lab

Question 7

Confirmatory Test

Answer 7

Confirmatory testing relies on other unique properties of blood, such as the proteins present on the surface of red blood cells called antigens

More accruate than presumitive test

Usslay done at lab after Presumtive test

Question 8

Antigen

Answer 8

Anything that stimulates an immune response.

Question 9

Antibody (immunoglobulin)

Answer 9

A protein produced by B cells in the blood; works to impair pathogens. Also called an immunoglobulin.

Question 10

ABO System

Answer 10

A system of four types (A, AB, B, and O) which human blood is classified into, based on the presence or absence of certain antigens.

Question 11

Agglutination

Answer 11

The clumping of particles.

Question 12

Universal Recipient

Answer 12

A person with O- blood

Question 13

Positive Control

Answer 13

In an experiment, the group that the researcher expects to have a positive result, to show that the experimental setup was capable of producing results.

Question 14

Negative Control

Answer 14

In an experiment, the group in which the conditions produce a negative outcome. Negative control groups help identify outside influences that were not accounted for when the procedure was created.

Question 15

List the 4 Blood Types

Answer 15

A,B,AB,O

Question 16

hypothesis

Answer 16

A statement predicting the anticipated results of an experiment.

Question 17

independent variable

Answer 17

In an experiment, the variable that the researcher intentionally changes to determine its influence on the dependent variable.

Question 18

dependent variable

Answer 18

In an experiment, the variable being measured and whose value is influenced by another variable.

Question 19

standard curve

Answer 19

A graph that plots known values which then allows the same properties to be determined for unknown samples by interpolation on the graph.

Question 20

Experimental Design

Answer 20

Question 21

Leucocrystal Violet (LCV)

Answer 21

LCV reacts with hemoglobin and turns a violet color. Usually used on porous surfaces, such as a large stain on a carpet, LCV is not the best test to use in the lab.

Question 22

Luminol

Answer 22

You may have seen luminol used in a crime show. Luminol glows bright blue in the dark when it comes in contact with blood. However, many other substances will cause it to react, so it is not the best test to use in the laboratory.

Question 23

Kastle-Meyer

Answer 23

The most common presumptive blood test. This test uses a compound known as phenolphthalein, which reacts with the iron carried by hemoglobin (Figure 3). This is the test you will use in the lab.