Microscope the condenser - Study guides, Class notes & Summaries

Biology 1406 Lab Exam 1Why is oil immersion used? - correct answer To reduce the amount of light rays that are refracted away from the objective lens. It increases numerical aperture and maintains a uniform light speed. increase the resolving power of a microscope. Prevents refraction of light. What parts of the microscope does light travel through? - correct answer Illuminator-The light source for the microscope. Diaphragm-Controls the amount of light entering the condenser. Condenser lens- ...

Define aseptic technique - Answer-Methods and procedures used in the laboratory to prevent contamination of the work area, the worker and the cultures with microorganisms. The Dutch merchant who made and used quality magnifying lenses to see and record microorganisms was? - Answer-Antonie van Leeuwenhoek Which form of medium is typically used to grow stock cultures? - Answer-agar slants Which form of medium is used to obtain large quantities of fresh cells/bacteria? - Answer-Broth medium T...

Portage Learning: Microbiology Module 3 Already Graded A Define the measurements micrometer and nanometer. A micrometer (μm) is defined as being one-millionth of a meter and is commonly designated at 10-6 meters. A nanometer (nm) equals 10-9 m or one-billionth of a meter. What are the two critical factors that influence your ability to see an object? Resolution and contrast. Resolution refers to the distance between two objects at which the objects still can be seen as separate. Poor or low r...

week 1: lab 1: what is a brightfield microscope correct answers a microscope that allows light rays to pass directly to the eye without being deflected by an intervening opaque plate in the condenser ocular correct answers the eyepiece. It consists of two or more internal lenses and has a magnification of 10x 4 objectives correct answers 1. 5x scanning 2. 10x low-power 3. 40x high-dry 4. 100x oil immersion total magnification correct answers multiply the ocular (10) by whatever ...

3 domains of the tree of life - Bacteria, Archaea, Eukarya 4 kingdoms of eukarya - Protista, Plantae, Fungi, Animalia arm - use to safely carry the microscope coarse adjustment knob - use to focus at low power ONLY competative inhibition - when molecules similar to a substrate compete for placement on the active site of an enzyme, Vmax is still possible is substrate concentration is high enough Condenser - concentrates the light on the specimen control treatment - a treatment in which you...

Lab 3: Microscopy- Observation of Cells Learning Objectives:  Use the compound light microscope for observation of cells.  Identify different types of bacteria based on their shapes.  Identify a variety of eukaryotic cells. VIDEOS: a) How to Use a Compound Microscope (Elon TLT) b) Parts of the Compound Microscope (Tami Guy) Introduction: Microbiology is the study of organisms, which cannot be seen with naked eye. You will need help of a microscope to observe these “tiny anim...

If you mount the slide so that the letter "e" is right side up as seen with the naked eye, how does it look through the microscope? Ans: upside down What happens if you move the slide toward the upper right area of the stage. What direction does the image move? Ans: it moves to the bottom left of the field of view (opposite of the way you move) Why must objects be centered in the field of view before going from low to high power using the compound light microscope? Ans: so you know ...

Microbiology-Lab 1 Exam Questions and Answers | 100% Pass BSL -Answer-Bio-safety Levels, the classification of microbes BSL-1 -Answer-"Organisms that don't typically cause disease" & are a minimal threat. Standard microbiological practices are adequate. They can be handled out in the open with no special equipment required. Examples are Bacillus subtilis & E. coli BSL-2 -Answer-Organisms encountered commonly in the community, "they present a moderate threat" of environmental and/or he...

Describe the position of your hands when carrying the microscope to and from your laboratory bench. correct answers Both hands should be used-- one holding the bottom of the microscope and one holding the arm Differentiate between the limit of resolution of the typical light microscope and that of the unaided human eye. correct answers light microscope = 0.2 um unaided human eye = 0.2 mm What two adjustments can be made to the condenser? correct answers height and diaphragm What effect...

Why is oil immersion used? - Answer To reduce the amount of light rays that are refracted away from the objective lens. It increases numerical aperture and maintains a uniform light speed. increase the resolving power of a microscope. Prevents refraction of light. What parts of the microscope does light travel through? - Answer Illuminator-The light source for the microscope.Diaphragm-Controls the amount of light entering the condenser. Condenser lens- Focuses light through the specimen. ...