Card Set Information
Questions for test #1
Charcteristics of fungi
Eukaryotic no photosynthesis have a cell wall
Charact of protozoans
Single celled; movmnt; mostly live in water
Char of algae
Unicellular & multicellular, undergo photosynth (need co2 and sunlight
Char of prokaryotes
No true nucleus
Theoris of the golden age of micro
- is apontaneous gen of microbial life possible
- what causes feementation
- what causes disease
- how can disease and infection be prevented
Explain redi's experiment
Used meat in flask to show spont gen was false
Soup in flask with corked lids and organisms still grew
Hay infusion with opening melted shut. Broke seal and microbes grew. Disproved spon gen
Main one to disprove spon gen. Uses heat infusion with a swan flask
List products developed from bacteria.
Cheese, alcohol, vinegar, yogurt, sour cream, bread
Who is responsible for germ theory
Study of the cause of a disease
List the four postulates of Robert Koch
- agent must be present in every case and absent from every healthy case
- amb isolated and grown outside the host
- amb introduced into a healthy host and develop the disease.
- amb reisolated from infected host
Contribution of Semmelweis
Awareness to germ transmission prevention
Ideas of antiseptics
Study of spread of diseases in humans
Invented vaccinations and small pox vaccine
Concept of chemotherapy and treatments for syphillis
Use of viruses, bacteria, fungi or other to toxins for threating or harmful purposes
Define defferential stain
a substance used to impart color to tissues or cells, to facilitate microscopic study and identification
What is microscopy?
The use of light or electrons to magnify objects
Ability to distinguish btwn objects that are close together
Ability to distinguish bwtn an object and its background
Why is oil immersion used
It prevents the scattering of light
Scanning electron microscope
Electrons pass over object for an external view
Transmission electron microscope
Electrons pass through the specimen giving an internal view
Why do org use nutrients?
Energy, building molecules, build maintain cell structures
Feed themselves co2
Get carbons from proteins, cho's, aa's, fa's
Energy from chemicals
Energy from light
Microbes that can live at cooler temps
Microbes that can live at warmer temps
What is uses as a solid medium
What is used as a liquid medium
What is an inoculum?
It is the sample to be grown (ie E. coli)
Def clinical specimen and give 5 examples
It is a sample human of human material- blood, urine, feces, saliva, CSF.
Def enviro specimen and give 3 examples
A sample that comes from the enviro (ponds, streams, soils)
What is selective media
Selective contains substance that favora growth of certain micros and inhibit growth of unwanted ones
What is differential media?
Media that contains ingrediants to differentiate btwn diff types of orgs
Why does an agar medium remain solid after bacteria and fungi grow?
The bacteria eat up the nutrients in the agar leaving it more solid than in the beginning.
Schwann & Scheiden
Cell theory- all living things are made up of cells
Site of protein production
Material in a cell that surround the organelles
Bag containing lipids, starches, nitrogens, sulfur, phosphorus
Allows for the passage of substances in and out of a cell
Chromosome and DNA
External layer of bacteria used for attachment
Glcocalyx with a lot of water
Glycocalyx attached to a cell wall that prevents dessication (drying out)
Why do pathogenic bacteria need glycocalyces?
Acts as camoflauge to hide from white blood cells