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Bio 210 Lab quiz 1

QuestionAnswer
What is the function of the iris diaphragm? regulates the amount of light on the stage
Define Par focal a subject/slide is in focus with one lens it will be in focus with all of the lenses
Doe the oil immersion objective lens need to touch the immersion oil? Yes
Does the field of vision/view increase or decrease when using the higher objective lenses? Decrease
Total magnification =_________ Ocular lens magnification multiplied by objective lens magnification
Scientific notation uses meters as the base unit and works in powers of _______ Ten
When a negative power (or exponent) is seen, the decimal point moves to the: Left
Nano(meters) is represented by (give the exponent): 10^-9
Micrometers are a ________ times smaller than meters. Million
What equipment will be needed/used to view a specimen that is measured in micrometers? A microscope
Give one example of something measured in nanometers? Viruses
What type of microscope would be necessary to view viruses? An electron microscope
Organisms that must be viewed with a microscope Microbes
Define Compound light microscope contain two sets of lenses (ocular and objective) and visible light is used to view a specimen
What makes a phase contrast microscope different than a compound light microscope? Contains a higher quality condenser which improves the contrast between the specimen and surrounding medium.
What are phase contrast microscopes used for? View living specimens internal structures and observe motility.
Describe electron microscopes and what they are used for Much larger and complex. They use electrons instead of light and are able to view viruses.
Transmission electron microscopes (TEM) allow what to be viewed? Detailed internal structures can be viewed
Scanning electron microscopes (SEM) allow what to be viewed? Detailed external structures to be viewed.
As magnification increases what should increase on the specimen, using what microscope component More light, iris diaphragm
Lens paper should be used on only what? Oil immersion lens
What is the function of the ocular lens? A way to look through and view slide/specimen
Function of the stage Platform to place slide on
Function of Fine Adjustment Knob and what lenses it is used for Used her focusing in high power, Used for all lenses
Function of Coarse Adjustment Knob and what lenses it is used for Used for focusing in lower power, only for scanning (4x) and low objective lens (10x)
Function of mechanical stage controls Used to more precisely move slide
Function of illuminator Source of light
Function of condenser Collect all light from illuminator and focus it
Function of iris diaphragm Regulate amount of light
Function of Objective lens Used to view the specimen more closely
What is the lens power of the scanning lens? 4x
What is the lens power of the low lens? 10x
What is the lens power of the high lens? 40x
What is the lens power of the Oil immersion lens? 100x
What happens to an image when viewed in a microscope? It is flipped, appears different than with naked eye
If you move a slide to the left what happens to the image in the field of view? It moves to the right
If you move the slide away from you what happens to the image field of view? It moves down
What happens to the image as you increase magnification? It's more shaded
Name metric from base to smallest measurement Meter, deci-, centi-, milli-, micro-, nano-
Name base metric measurement to largest measurement Meter, deka-, hecto-, kilo-, mega-, giga-
Base= __ meter 1
1 decimeter = ____ meter 1/10
1 Centimeter = ___ meter 1/100
1 millimeter = ___ meter 1/1000
What is micro in scientific notation? 10^-6
What is nano in scientific notation? 10^-9
1 dekameter = ____ meters 10
1 hectometer = ___ meters 100
1 kilometer = ___ meters 1,000
1 megameter = ___ meters 1 million
1 gigameter = ___ meters 1 billion
Write 1 megameter in scientific notation 10^6
Write 1 gigameter in scientific notation 10^9
A whole number is represented with a ________ exponent of 10 Positive
A fraction is represented with a __________ exponent of 10 Negative
Convert whole number to fraction decimal moves Left
Convert fraction to whole number decimal moves Right
Examples of objects measured in micrometers Bacteria
Examples of objects measured in nanometers Viruses
What is microbiology? Study of microorganisms
Name 5 examples of microbes Protozoa, algae, fungi, bacteria, and viruses
Name 3 uses of microbes Breakdown of waste, make foods (cheese and bread), and synthesize vitamins
Define pathogens Disease causing agents
Who discovered The 1st antibiotic penicillin? Alexander Fleming
What organism helps add oxygen to the environment and uses C02? cyanobacteria
How do algae get their food? Name an example Photosynthesis, seaweed
What was used to study the evolution of bacteria, map human genome, and discover antibiotics? DNA
What is the name of the 4 "puzzle pieces" that compose DNA? Nucleotides
Why is SAR 11 difficult to grow in a lab? Not sure what it eats, it is built to live on very little food, may need other microbes to survive.
Created by: Beckster89