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| The ______________________ separates the cell from the surrounding environment. |
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| The ____________________ contains organelles suspended in a watery cytosol. |
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| The ____________________ is the same as the intracellular fluid. |
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| The ____________________ is a membranous structure that protects DNA |
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| The ___________ ______________ ______________ implies that membranes are fluid like sheets in which the molecules move about freely in a planar fashion. |
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| A membrane is made of a ___________________ ___________________ whose surfaces are hydrophilic while the center of the layer is hydrophobic. |
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| _________________ contributes to the stability of membranes. |
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| _____________ or water-soluble molecules do not pass through a membrane very easily. |
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| _______ are stiff groupings of membrane molecules that move around together. |
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| Membrane Functions: To _______________ movement of molecules. |
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| Membrane Functions: To serve as a ___________ for reactions, connections, and communication. |
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| Membrane Functions: Many functions of membranes are accomplished by membrane __________ |
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| The two categories of organelles are M_______________ and N_____________________. |
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| MEMBRANOUS AND NONMEMBRANOUS |
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| The ______________________ _________________ is a membranous canal system to move new proteins within the cell that will be part of a membrane or secreted. |
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| The ____________ ER has ribosomes on its surface and is closer to the nucleus while the _____________ ER does not have ribosomes and is further away from the nucleus. |
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| The Smooth ER is a source for new L_________ and even C___________________. |
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| The ____________ ________________ is a membranous structure which processes and packages proteins. |
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| ________________ are membranous structures that serve as the cells digestive system. |
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| _____________________ are membranous structures that detoxify harmful substances. |
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| _______________________ have inner and outer membranes and also serve as the power plant of the cell. Each one also has its own DNA molecule. |
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| The __________________ is enclosed by two membranes (nuclear envelope) containing pores. It protects the cells hereditary material, DNA. |
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| DNA has two forms: It can be a soupy mass called ______________ or it can be condensed and highly organized to which it is referred to as a __________________. |
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| Within the nucleus there is a ___________________ which is the site of rRNA synthesis and ribosome formation. |
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| ___________________ have two subunits; a large and a small. They are responsible for synthesizing proteins. |
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| ____________________ are hollow protein cylinders that breakdown abnormal or misfolded proteins. |
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| The _______________________ is the cells internal supporting framework. It is composed of 3 types of rodlike pieces. |
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| The 3 filaments of the cytoskeleton are: ______________________ which act as cellular muscles (smallest) __________________ _________________ which provide mostly framework (intermediate) and _______________________ which are used for intracellular transport and cell movement. (largest) |
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| MICROFILAMENT, INTERMEDIATE FILAMENT, AND MICROTUBULE |
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| The _______________ is made of two _________________ and coordinates building and breaking of microtubules. It is also called the microtubule organizing center or MTOC. It is very important especially during cell division. |
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Definition
| CENTROSOME AND CENTRIOLES |
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| _______________ _______________ are proteins which pull loads along the cytoskeleton. |
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| Cell extensions are projections of the _____________________. |
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| _________________ are small and many, they are used for absorption due to their increased surface area. |
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| ______________ are also small and many and used to propel things along the trachea, for example. |
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| _______________ in humans are only found on sperm cells for motility. There is usually only one flagella per sperm cell. |
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| __________________ are fibers on outer cell surfaces that interlock with neighboring cells. |
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| ______________ desmosomes are like spot welds, where as __________ desmosomes are connections that encircle the entire cell like a collar. |
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| _______ ______________ are cell-cell connections by membrane channels. They effectively fuse the two cells cytoplasms so that things can go from one cell to the other very easily. |
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| _________ ______________ are tightly fused collars between cells. They do not allow molecules to bass between the cells that are connected. The best example of this kind of connection is in the intestinal lining. |
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