6.7

Question 1

Give a definition of the non-specific immune response

Answer 1

The generalised immune response that can target any unknown pathogen

Question 2

When the skin is damaged, the site of infection becomes red and there is localised swelling. Explain why this occurs.

Answer 2

Inflammation, cause by liquid moving into infected tissue and more blood flow to the area

Question 3

Describe the role of interferons in limiting infection

Answer 3

Made in response to pathogens to recruit other immune cells and trigger a greater immune response

Question 4

Describe the role of phagocytes in limiting infection

Answer 4

Undertake in phagocytosis, finding pathogens by chemotaxis, “swallowing” them and breaking them down using digestive enzymes

Question 5

Describe the role of lysozymes in limiting infection

Answer 5

Tear holes in peptidoglycan (bacterial) cell walls to allow water to enter and kill the cell