TEST 11 - IMMUNE SYSTEM

Question 1

What is a pathogen?

Answer 1

A pathogen is a disease-causing agent that carries foreign proteins (antigens) recognized by the immune system.

Question 2

What is the difference between a pathogen and a non-pathogen?

Answer 2

A pathogen causes disease; a non-pathogen does not. Pathogens have foreign antigens that trigger an immune response.

Question 3

What are some common types of pathogens?

Answer 3

Bacteria (e.g., Cholera), viruses (e.g., HIV), fungi (e.g., Athlete’s foot), protozoa (e.g., Malaria), and worms (e.g., tapeworms).

Question 4

What are the main methods of disease transmission?

Answer 4

Through air (respiratory droplets), direct physical contact, contaminated food, breaks in the skin, infected needles, blood transfusions, and animals/insects.

Question 5

Give an example of a disease caused by a virus, a bacterium, and a fungus.

Answer 5

• Virus: HIV
  
  • Bacterium: Tetanus
  • Fungus: Athlete’s Foot