2nd Line of Defence

Question 1

INFLAMMATION

Answer 1

• Heat caused by the increased blood flow as white blood cells are travelling to the site of infection.
• Swelling increases blood and fluid in the area as white blood cells kill pathogenic microorganisms.
• Swelling also localises infection
• Redness due to increased blood flow and permeability of the capillaries

Question 2

FEVER

Answer 2

• Core body temperature is reset to be greater than 37.2 degrees and the higher temperature kills pathogenic microorganisms.
• The increased temperature also triggers T cells which helps speed up the body’s reactions and help repair damaged cells and tissue.

Question 3

PHAGOCYTOSIS

Answer 3

• White blood cells “eat bacteria, viruses and dead/injured body cells.

Question 4

PROTECTIVE PROTEINS

Answer 4

• Complement System
• They flow freely in the blood and can quickly reach the site of an invasion where they can react directly with antigens Trigger inflammation.
• Coat intruders so that eater cells are more likely to devour them
• Kill intruders