science test study cards part 2 Flashcards
to be able to know anwsers
List 3 reasons for the importance of microscopes.
- Allows scientists to see microscopic organisms and cells. 2. Helps in medical research and diagnosis. 3. Makes it easy for medical students to learn to identify cells, organelles, and diagnose.
When were microscopes invented?
1600
around the 1600s, 1590
What is the purpose of why scientists use microscopes?
To magnify and study objects too small to be seen up close.
Who invented the 1st microscope?
Zacharias Janssen
Who was the 1st scientist that discovered microorganisms and cells under the microscope?
Antonie Van Leeuwenhoek
Who wrote the description of cells under the microscope?
Robert Hooke
What are 3 types of microscopes discussed in class?
- Light microscope 2. Scanning probe microscope 3. Electron microscope
When looking at a specimen under the microscope, you would turn your ____ knob to bring the specimen into the ____ of view.
coarse knob; field
How should you carry a microscope?
Holding it by the arm and the base.
What should you use to clean the microscope lens area and objectives?
Always use lens paper.
What should you never use to clean a microscope?
You should never use tissue, paper towels, and cloth.
What is the name of the solution used to stain banana cells and what is its purpose?
It breaks down the cell wall and makes it easier to see the cells underneath the microscope.
What are two organelles that you can see in the banana cells under the microscope?
Cell wall, amyloplasts
What type of microscopes are atoms visible?
Scanning microscopes
What type of microscope are virus cells visible?
Electron microscope
Ocular/Eyepiece Lens: 10x, Objective: 20x, Total Magnification?
200x
Ocular/Eyepiece Lens: 10x, Objective: 4x, Total Magnification?
40x
Ocular/Eyepiece Lens: 10x, Objective: 10x, Total Magnification?
100x
Ocular/Eyepiece Lens: 10x, Objective: 40x, Total Magnification?
400x
Ocular/Eyepiece Lens: 20x, Objective: 5x, Total Magnification?
100x
What 3 organelles are present in the displayed cells?
Nucleoid, Vacuole, Mitochondria
What is the definition of cocci?
Spherical shaped or circular shaped bacteria.
What is a virus?
A submicroscopic infectious agent that replicates only inside the living cells of an organism.
What is a pathogen?
A bacterium, virus, or other microorganism that can cause disease.
What is agar?
A plant-based gelatin derived from seaweed or red algae.
What are bacilli?
Rod-shaped bacteria.
What are spirilla?
Spiral shaped bacteria cells that can cause and spread disease.
What is a colony?
A visible mass of microorganisms all originating from a single mother cell.
What is a host cell?
A cell that can grow and replicate (multiply) invading the organism.
