Immune System Flashcards
(8 cards)
1
Q
3 Key roles
A
- defence against pathogens
- removal of worn out cells
- identifying and destroying abnormal mutant cells in body
2
Q
Skin
A
protective barrier; acidic sweat kills invaders
3
Q
Respiratory System
A
Mucus and cilia filter out invaders
4
Q
Stomach
A
Acid destroys foreign cells
5
Q
Tears, Saliva, and Sweat
A
contain lysozyme, enzyme that can destroy cell walls of bacteria
6
Q
Leukocytes
A
- squeeze out of capillaries, move towards foreign invader.
- called marcophages surround invaders by phagocytosis & digest it with enzymes
6
Q
Antibody/antibodies
A
fits specific antigen (lock and key)
Antibodies: stop viruses and bacteria from invading and spreading infection
7
Q
antigens
A
has surface marker to identify
