Defence Against Pathogens

Question 1

Skin

Answer 1

Physical barrier. Prevents things entering blood stream.

Chemical barrier. Produce antimicrobials that lower ph, inhibiting growth of pathogens

Question 2

Mucous

Answer 2

Protect openings. Traps pathogens and contain antimicrobial enzymes

Question 3

Blood clotting

Answer 3

Prevents entry of pathogens from wound

Question 4

Inflammation

Answer 4

Used to isolate pathogens vasodilation may occur increasing rate of white blood cells

Question 5

Wound repair

Answer 5

Skin is capable to repair itself after injury. The outer skin divides and migrate. The tissue below wound contracts closing the wound.

Question 6

Expulsive reflexes

Answer 6

Coughing and sneezing. Projects pathogens away from the body