KA5- Non Specific Defenses

Question 1

1) Immunity is… 16

Answer 1

the ability to destroy pathogens and if they are successful in invading, their destruction

Question 2

2) Epithelial cells form… 6 Closely packed…17

Answer 2

a physical barrier
epithelial cells are found in the skin and inner linings of respiratory and digestive systems

Question 3

3) Inflammatory response: If… , …. 15 Increased… causes… 16

Answer 3

damaged, histamine is released by mast cells and causes vasodilation and increased capillary permeability
blood flow causes the accumulation of phagocytes and clotting elements at the site of infection

Question 4

4) Chemical secretions containing… 11 Secretions include… 7

Answer 4

anti-microbial chemicals are produced against invading pathogens
sweat, tears, mucus, stomach acid

Question 5

5) Phagocytes recognise… 8 Phagocytosis involves… 15

Answer 5

pathogens and destroy them by phagocytosis
involves the engulfing of pathogens and their destruction by digestive enzymes contained in lysosomes

Question 6

6) Phagocytes release…12 They are… causing.. 23

Answer 6

cytokines that attract more phagocytes to the site of infection
protein molecules that act as a signal to specific white blood cells causing them to accumulate at the site of infection