Micro Unit 1, Ch.1: Humans and the Microbial World

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Microorganisms

living things too small to be seen without a microscope

Pathogens

disease-causing microbes

Virulence

strength of microbe to cause disease

Antibiotics

natural substances produces by bacteria and fungi to kill other microbes

Aseptic Techniques

procedures that prevent contamination

Theory of Spontaneous Generation

organisms can arise from non-living materials

Germ Theory of Disease

microbes cause disease

Robert Hooke

discovered plant cells with microscope (lens, tube, plants, "little compartments")

Leeuwenhoek

discovered microbes (in pond water)

Tyndall and Cohn

discovered heat resistant forms of bacteria called endospores

Virchow

discovered all cells come from pre-existing cells

Pasteur

showed that microbes can be destroyed or blocked

Lister

began aseptic techniques in medicine

Jenner

developed the idea of vaccination

Alexander Flemming

developed a set of steps for determining if disease is caused by a certain microbe

Nomenclature

naming (using catagories)

5 Kingdoms developed by Whittaker

Monera, Protista, Fungi, Plants, Animals

Monera

bacteria, single cells without a nucleus

Protista

single cells with a nucleus

Fungi

single or multi celled organisms with a nucleus and cell walls made of Chitin

Algae

single or multi celled plants that live in the water

Viruses

acellular particles (not a complete cell); made of two basic things (hereditary material surrounded by protein)

Helminthes

worms

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