Chapter 4

Question 1

Disease

Answer 1

any change that impairs the function of an individual in some way and causes harm to the individual

Question 2

Non-Infectious disease

Answer 2

disease that cannot be spread from one organism to another

Question 3

Infectious Disease

Answer 3

a disease that is contagious (can be spread from one organism to another) and caused by a pathogen

Question 4

Pathogen

Answer 4

a disease-producing organism

Question 5

Celluar Pathogens

Answer 5

pathogen that is made up of cells, such as a tapeworm, fungus or bacterium

Question 6

Non-celluar pathogens

Answer 6

a pathogen that is not made up of cells, such as a virus, prion or viroid

Question 7

Qurantine

Answer 7

Strict isolation of sick people from others for a period of time (originally 40 days) in order to prevent the spread of disease

Question 8

Vectors

Answer 8

an organism that carries a pathogen between other organisms without being affected by the disease the pathogen causes; an organism that carries and disperses reproductive structures (e.g. pollen) of a different species

Question 9

Parasite

Answer 9

Organism that lives in or on another organism. The parasite benefits while usually harming the host organism.

Question 10

Ectoparasite

Answer 10

parasite that lives outside the body of its host organism

Question 11

Endoparasite

Answer 11

parasite that lives inside the body of its host organism

Question 12

Prions

Answer 12

a non-cellular pathogen

Question 13

Virus

Answer 13

A non-cellular pathogen