Defence Mechanisms

Question 1

What are types of defence mechanisms?

Answer 1

• Non specific physical barriers
• Non specific inflammatory response
• Specific immune response

Question 2

What are examples of non-specific physical barriers?

Answer 2

Skin
Tears
Saliva

Question 3

What is an example of a non-specific inflammatory response?

Answer 3

Phagocytosis
- Region invaded with pathogens swells

Question 4

What are examples of specific immune response?

Answer 4

• Cell mediated response via T lymphocytes
• Humoral response via B lymphocytes
• This process is much slower than non-specific

Question 5

What is the second line of defence?

Answer 5

• Non specific defences inside the body that inhibit or destroy pathogens
• React to any pathogen, regardless of species
• WBC involved in most of these responses

Question 6

What is the process of inflammation?

Answer 6

• Pathogen / toxin enters body
• Clot forms
• Inflammatory chemicals released (e.g histamines)
• Blood vessels dilate and permeability increases
• This increases blood flow to the area and allows leukocytes to get into tissue spaces