Lesson 1 Cellular Pathogens

Question 1

What is a pathogen?

Answer 1

A pathogen is a disease-causing agent.

Question 2

What are the two types of pathogens?

Answer 2

Cellular

Non-cellular

Question 3

What makes something cellular?

Answer 3

Made of cells
Able to reproduce independently
Able to undertake independent metabolic processes

Question 4

What are 2 examples of each cellular pathogen?

Bacteria, Fungi and Parasite

Answer 4

Bacteria-Tuberculosis, Cholera
Fungi- Athletes foot, Ring Worm
Parasites- Tapeworm, Head lice

Question 5

Benefits of Bacteria

Answer 5

Digest food
Absorb nutrients
Protect us from pathogenic bacteria

Question 6

How do bacteria cause disease

Answer 6

Bacteria releases toxin
Bacteria population numbers are high due to rapid reproduction by binary fission
Increase the volume of toxin and causes illness

Question 7

What are parasites and how do they live?

Answer 7

Multicellular pathogens that live on or in a host to gain nutrients.

Question 8

What is an anitgen?

Answer 8

An antigen is a unique molecule or part of a molecule that initiates an immune response.

Question 9

What is the difference between non-self antigens and self-antigens?

Answer 9

Self antigen= Recognised so no immune response

Non-Self antigen= Recognised by the immune system so immune response