2.5 S.2.5 - Describe the Role of Microorganisms in Disease
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Organisms that cannot be seen with the naked eye and may be classified as bacteria, viruses, fungi, protozoa (including algae), or animals
microbes/microorganisms
Eukaryotic organisms that obtain nutrients by absorbing organic material from their environment (decomposers) through symbiotic relationships with plants or harmful relationships with a host
fungi
Diseases that spread from one person to another
infectious/communicable diseases
Diseases that cannot be transmitted directly from one person to another
Non-infectious
Unicellular eukaryotes. They are the largest group of organisms in the world in terms of numbers, biomass, and diversity
protozoans/protists
Microbes that are not free-living and must find a host from which to gain nutrients
parasites
A larger organism on/in whose body a parasite lives
host
An infectious agent
pathogen
A magnification instrument that forms an image using a beam of electrons that travel at high speeds and form a wavelike pattern
electron microscope
What term is used to describe all disease-causing microorganisms?
Pathogen Pathogens are disease-causing microorganisms.
Which if the following is at the core of every virus particle?
DNA or RNA Every virus’s core contains either DNA or RNA as its genetic material.
Which microscope achieves the greatest resolution and highest magnification?
Electron The electron microscope is able to achieve magnification of specimens that far exceeds that of any light microscope and with greater resolution.
In your own words, explain the differences between infectious and non-infectious diseases.
Infectious diseases are diseases that spread from one person to another and are commonly called communicable diseases. They are caused by microorganisms called pathogens such as bacteria, protozoans, virus and other such microbes. Non-infectious diseases do not spread to others and they remain within a person who has contracted them. These diseases are not caused by pathogens, but by other factors such as age, nutritional deficiency, gender heredity, and lifestyle.