Immune System Review

Question 1

immunity

Answer 1

the ability to resist injury or infection

Question 2

lymphatic system

Answer 2

a network of cells, vessels and tissues that provide immune surveillance

Question 3

lymph nodes

Answer 3

solid, spherical bodies that are packed with macrophages and lymphocytes that are cells that are specialized to recognize anything that is foreign to the body

Question 4

innate body defences

Answer 4

present before an infection has occurred and that provide the first line of protection from pathogens

Question 5

phagocytes

Answer 5

the primary cells of innate immunity once physical barriers are breached. engulf pathogens and other substances

Question 6

interferons

Answer 6

antimicrobial proteins that are crucial components of the innate body defence system

Question 7

complement system

Answer 7

cluster of 20 plasma proteins that combine in a specific sequence and order when infection occurs

Question 8

histamine

Answer 8

is a key chemical mediator of inflammation

Question 9

adaptive defences

Answer 9

immune response to foreign substances and certain threats

Question 10

antigens

Answer 10

microbes and foreign substances that elicit an immune response.

Question 11

B cell

Answer 11

known as a B lymphocyte and is triggered when an antigen comes in contact with it

Question 12

plasma cells

Answer 12

primary function is to secrete antibodies specific to the antigen that initiated the challenge

Question 13

antibodies

Answer 13

also known as immunoglobulins, they interact with antigens to neutralize or mark them for destruction by other cells of the immune response

Question 14

T cells

Answer 14

also known as T lymphocytes. second branch of response to the immune response

Question 15

cytokines

Answer 15

hormone like proteins that regulate the intensity and duration of the immune response and mediate cell to cell communication