Term
| The most frequently used microscope is the _______ microscope. The specimens seen through this microscope can be magnified up to ____ the size of the specimen. |
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Definition
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Term
| The increase in the apparent size of an object is... |
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Definition
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Term
| Resolution is the measure of the ______ of an image. |
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Definition
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Term
| Microscopes do have limitations. A big limitation they have is the amount of ________ that can be seen by _______. |
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Definition
| resolution seen by the human eye |
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Term
| Light microscopes are used to study... |
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Definition
| micro organisms, structures within cells, as well as animal/plant cells |
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Term
| Beginning in the 1950's, scientists started using _____ microscopes to view the _______ structure of cells. |
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Definition
| electron; ultra structure |
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Term
| Instead of light, electron microscopes uses a __________________. |
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Definition
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Term
| ______ _______ _______ (SEM) study the detailed architecture of cell surfaces |
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Definition
| scanning electron microscopes |
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Term
| _______ _______ _______ (TEM) study the details of maternal cell structure |
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Definition
| transmission electron microscopes |
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Term
| ________ _________ light microscopes amplify differences in _______ so that structures in living cells appear almost ___ dimensional. |
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Definition
| Differential interference;density;three-dimensional |
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Term
| Cell size needs to be both large & small. It should be large as so it can house ____, _____, and _____ needed as to make it possible for it to survive and reproduce. Yet, it needs to be small enough to allow a _____-to-______ ratio that will allow adequate exchange with the environment. |
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Definition
DNA, proteins, and structures:
surface to volume ratio |
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Term
| The _______ membrane, AKA the ____ membrane, forms a flexible boundary between the _________ and it's _______. |
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Definition
plasma membrane, AKA the cell membrane;
living cell and it's surroundings |
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Term
| Phospholipids from a two layer sheet called a __________ _______ in which hydrophilic cells face _____, while hydrophobic cells point _____. |
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Definition
phospholipid bilayer;
outwards...inwards |
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Term
Membrane proteins are either...
attached to the __________ OR
embedded in the ____________. |
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Definition
| attached to the membrane surface or embedded in the phospholipid bilayer |
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Term
| Proteins have two main functions within cells. Some form tunnels or channels that shield ___ and other _______ molecules as they pass through the _____ center of the membrane. Other proteins serve as ____, using energy to help ________ molecules. |
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Definition
ions and other hydrophilic;
hydrophobic center of the membrane;
transfer molecules |
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Term
| Bacteria and archaea are prokaryotic cells. ____________ are eukaryotic cells. |
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Definition
| All other forms of life are eukaryotic cells |
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Term
| Both prokaryotic and eukaryotic cells have a _____ membrane and one or more _______/_______. Yet, they differ because ______ don't have a true nucleus, and instead have a ______. it also has no true ________. _______ cells have a ______ nucleus and a number of _____. |
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Definition
cell membrane... one or more chromosomes/ribosomes;
nucleoid and no true organelles.
Eukaryotic...membrane-bound and a number of organelles |
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Term
| The DNA of a prokaryotic cell resides in the _____, but no ___ surrounds the DNA. |
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Definition
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Term
| A cell's _____ helps propel the cell through it's liquid environment. |
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Definition
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