Lab Exam Flashcards
What do you need to bring to every lab period?
- A lab coat
- Lab manual
- Standard note taking supplies
- Full length pants or skirt
- Eye protection
- Waterproof felt pen
- Time piece capable of measuring seconds
- An elastic (for long hair)
- Closed footwear
Pure Culture
An isolated group of genetically identical cells
Colony
A small mass of genetically identical cells
Medium (pl. media)
a solution or solid that contains nutrients a cell can use to grow and divide. It can be left as a liquid or can be mixed with a substance to solidify it
Lawn
a dense, even layer of bacteria on the plate with clearings where the antibiotics kill the cells
Lawn
a dense, even layer of bacteria on the plate with clearings where the antibiotics kill the cells
Light microscope
A microscope where light travels from the light source, shines on the specimen, and its image is then magnified by the lenses
Ocular lens
Magnifies an image and inverts it for viewing
Objective lens
Magnifies the image of the specimen
Condenser lens
Focuses light on the specimen
Condenser lens
Focuses light on the specimen
Light source
Small powerful light bulb
Field iris diaphragm
Controls the amount of light entering the lens system. Decreasing the amount of light can improve contrast
Contrast
the difference between light and dark on the slide
Stage
the horizontal surface where the slide is placed. It moves horizontally so you can locate an object on the slide, and vertically so you can focus on the slide
Objective lenses
gather light from the specimen, magnify the image, and project the magnified image into the body tube
Course focus knob
moves the stage up and down to bring an object into focus
Fine focus knob
is the small knob on the course adjustment knob. Brings the object into focus under low power and is used for all focusing when using higher power lenses
Body tube
contains a prism that allows light to pass from the objective lens to the ocular lens
Ocular lens
magnifies the image
Ocular lens
magnifies the image
Total magnification of a microscope
The product of the magnification of the objective lens and the ocular lens
Total magnification=
magnification (ocular lens) x magnification (objective lens)
Total magnification of a microscope
The product of the magnification of the objective lens and the ocular lens
Total magnification=
magnification (ocular lens) x magnification (objective lens)
Osmosis
Passive transport where water moves across a membrane from an area of low solute concentration to an area of high solute concentration
