Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science Test 2
Cells
| Question | Answer |
|---|---|
| Without looking at a picture, where is the ocular lens (eyepice) in a microscope? | at the top, it is the thing you used to look down through the microscope. |
| Where is the body tube in a microscope? | It is below the ocular lense and you look through this tube to look at your specimen |
| Where is the arm in a microscope? | It is above the stage, and holds the microscope together. |
| Where is the revolving nose piece in a microscope? | This is right belows the body tube, and holds the objective lens. |
| Where is the stage in a microscope? | This is right above the diaphragm, and holds the specimen you are looking at. |
| Where are the stage clips in a microscope? | They are on the stage and hold the specimen in a specific place so you can see it better. |
| Where is the diaphragm in a microscope? | This is below the stage and controls how much light comes in towards the specimen. |
| Where is the coarse adjusment knob in a microscope? | This is right above the fine adjustment knob, and moves the stage up and down quickly, so that you can focus on your specimen coarsely |
| Where is the Fine adjustment knob in a microscope? | This is right below the coarse adjustment knob, and moves the stage up and down slowly, so that you can focus on your specimen finely. |
| Where is the light source in a microscope? | This is above the base, and allows us to look at our speciment by shining light on it. |
| Where is the base in a micrscope? | This is belows the light source, and holds the microscope together. |
| How do we make compound microscopes? | by combining simple lenses |
| What is a virus? | A virus is a very small single-celled organism that can be classified as either a living or non-living organism. |
| How are viruses spread? | - by simple contact like coughing, or sneezing, -through sexual contact -entering the human body via contaminated food or water - via insect carrying the virus from person to person |
| In an animal cell and plant cell, what does the cell membrane do? | it holds the cell together and controls what goes in and out of cell |
| In an animal cell, what does the temporary vacuole do? | it is a little sac in which some substances are stored for a while. |
| In an animal cell, what does the endoplasmic reticulum do? | it assists in the production of proteins, fats and oils |
| In an animal cell and plant cell, what does the mitochondrion do? | it supplies the cell with energy |
| In an animal cell and plant cell, what does the nucleus do? | It controls what the cell does. |
| In an animal cell and plant cell, what does the cytoplasm do? | This fluid fills the cell. In this fluid, energy is transferred, substances are made and food is stored. |
| In a plant cell,what is the cell wall? | It is the tough layer outside the layer of the cell. |
| In a plant cell, what does a large permanent vacuole do? | a very large cavity filled with a watery fluid called cell sap. |
| In a plant cell, what does the chloroplast do? | This is where photosynthesis occurs. |
| What is a cell? | the building blocks of living things |
| What is a compound microscope? | a microscope that is built from two or more lenses, one of which is in the single eyepiece. It is used to magnify very small objects such as a drop of water or a very thin slice of tissue. |
| What is a cover slip? | a very thin piece of glass that is used to cover a specimen on a microscope slide |
| What is cytoplasmic streaming? | a process in which chloroplasts and other organelles can move around the ctyoplasm of living cells |
| What is diffuse? | to become widely dispersed; spread out |
| What is an electron microscope? | A microsope that uses a beam of electrons instead of light to obtain the image and can magnify things up to a million times. Transmission electron microscopes and scanning electron microscopes are the two main types. |
| What is an epidermal? | The outermost layer of cells in plants and animals? |
| What are eukaryotes? | organisms with cells that containg a distinct nucleus |
| What is a fair test? | A test in which the effect of one variable is tested and all other variables are kept the same, so that any differences observed must be due to the variable being tested. |
| What is fermentation? | a process in which sugars are converted to alcohol and carbon diozide by organisms such as yeast to obtain their energy |
| What is a microbiologist? | A person who studies teh branch of biology that deals with microorganisms and their effects on other living organisms |
| What is an organ? | A complex structure in a large organism, such as an eye, wing or leaf, that performs a specific function. |
| What are organelles? | small structures inside eukaryote cells |
| What is osmosis? | diffusion of water through a semipermeable membrane from a dilute solution to a concentrate solution until there is an equal concentration of fluid on both sides of the membrane |
| What is photosynthesis? | the chemical reaction in whihc carbon dioxide and water are converted into both glucose and oxygen. This process requires chlorophyll and sunlight. It occurs within the cells that are present in the chloroplasts of plant leaves. |
| What is plasmolysis? | A shrinkage or contraction of the cytoplasm away fromt the wall of a living plant, caused by loss of water through osmosis |
| What are prokaryotes? | Organisms whose cells do not have a nucleus |
| What are replicates? | repeat trials of experimental tests, to reduce random sampling errors |
| What is respiration? | The process in which nutrients are converted into useful energy in a cell |
| What is scanning electron microscopy? | it involves electrons interacting only with the surface of the object being viewed |
| What is a scanning tunnelling microscope? | a type of electron microscope that uses the quantum-mechanical tunnel effect to study atomic structures and observe single atoms |
| What is semi-permeable? | letting some (usually very small, uncharge) substances through, but not others |
| Whatare tissues? | groupings of similar cells |
| What is transmission electron microscopy? | it requires electrons to pass through very fine slices of tissues |
| What are unicellular organisms? | organsims that consist of a single cell |
| What is a variable? | A factor in an experiment that may affect the results and that can be changed |
| Why are osmosis and diffusion important? | Because through them we can have homeostasis, a stage of healthiness. Also through them things that need to be transferred between cells are transferred. |
| What are the three basic principles of cell theory? | All living things are made of cells. Cells are the smalles unit of life. Cells only come from other cells. |
| What organelles do bacteria consist of? | Cell membrance, slime capsule, cell wall, plasmids, flagella, genetic material, and cytoplasm |
| When is the only time you can see bacteria? | When it colonizes |
| What are some more details about bacteria? | Bacteria have no nucleus DNA is circular and free in the cytoplasm Rings of DNA called plasmids carry extra genetic info Flagella (tails) allow the bacteria to move The slime capsule protects the bacteria |
| What are some uses of bacteria? | Making yoghurt Making cheese Good bacteria in our gut help with digestion Making medicines e.g. penicillin |
| What is the structure of yeast? | cell membrance, nucleus, cell wall,cytoplasm, mitochondria, endoplasmic reticulum, plasma membrane , Golgi apparatus, and ribosomes |
| What are some more details about yeast? | Yeast is bigger than bacteria (3-4μm) but still very small Yeast reproduce by asexual budding Aerobic respiration makes bread rise Anaerobic respiration (lack of oxygen) produces ethanol by a process called fermentation |
Created by:
kaylee72sommers
Popular Biology sets