Immunity Definitions

Question 1

Physical Barrier

Answer 1

Prevents pathogen from entering the organism. Ex; skin

Question 2

Chemical Barrier

Answer 2

Destroys pathogens once they have entered the organism

Question 3

Non- Specific Immunity

Answer 3

Attacks many different pathogens

Question 4

Specific immunity

Answer 4

Is able to recognize and react to specific antigens and remember the antigen so the response is quicker next time. In blood stream

Question 5

1st line of defence

Answer 5

Physical and chemical barriers that keep out and destroy pathogens.

Question 6

2nd line of defence

Answer 6

Destroys pathogens that have entered the body

Question 7

Interferons

Answer 7

Substances that virus infected cells produce, helping other cells by interfere with or resist infection by the virus interferons cannot save an infected cell but can protect uninfected cells.

Question 8

Humorral Immunity

Answer 8

The production of antibodies and memory B cells against pathogens in the blood

Question 9

Cell mediated immunity

Answer 9

The destruction of cells already infected by a pathogen. Creates T-Cells

Question 10

Memory B-Cells

Answer 10

Carry out the hummoral immune response. Subsequent infections.

Question 11

Memory T-Cells

Answer 11

Produced during first infection. Receptors detect the antigen during second infection and produce KTC.

Question 12

Helper T-Cells

Answer 12

Recognizes antigen and sends signal to WBC and to attack

Question 13

Killer T cell

Answer 13

Links to infected cell and kills them them by piercing a hole through the membrane

Question 14

Antigen

Answer 14

Protein in a cell membrane that identifies that cell

Question 15

Antibody

Answer 15

A protein in the blood that flags pathogens and infected cells for destruction.

Question 16

Passive Artificial Immunity

Answer 16

Antibodies that come from another human or animal are injected into the body. Ex; vaccine

Question 17

Natural Active Immunity

Answer 17

Obtained when a person is exposed to a pathogen. When the person is sick, the body will make antibodies and memory B and T cells. Ex. getting a cold

Question 18

Bacteria

Answer 18

A unicellular microorganism with no nucleus and only one chromosome, some are pathogens.

Question 19

Virus

Answer 19

A microscopic infectious particle processing only one type of DNA that cannot replicate without taking over another cells machinery.

Question 20

Lymph

Answer 20

Pale yellow liquid that bathed the body cells and collects waste. It is plasma that has escaped from the capillaries and is absorbed in the lymph vessels and is returned to the circulatory state by joining the subclavian vein

Question 21

Lymph Vessels

Answer 21

Go one direction from the body cells to the heart and contains values to prevent lymph from pooling

Question 22

Plasma

Answer 22

Liquid that carries WBC

Question 23

Blood vessel

Answer 23

Vessel that carries blood. Includes arteries, veins and capillaries Goes two directions.

Question 24

Lymph nodes

Answer 24

Glands through out the body that can be found in;

Elbow, groin, neck and armpit.

Assures the filtration of bacterial.

Lymphocytes mature here

Lymphnides swell during an infection because the number of macrophages combat the invading bacteria