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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Tight junction |
Occurs in cells that are joint near there apical surface by "collars", of tightly used membranes. |
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Gap junction |
Formed when membrane channels of adjacent plasma membrane's connect to each other. |
Form gaps or "tunnels" that joined the cytoplasm of two cells, and they fuse the two plasma membrane's into a single structure. |
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Desmosomes |
Have the appearance of small "spot welds" that hold adjacent cells together. |
The fibers on the outer surface of each spot desmosome interlock with each other. |
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Flagella |
Hair-like extensions of plasma membrane, supported internally by cylindrical formation of microtubules sometimes with attached molecular motors |
Propel sperm cells |
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Nucleus |
A usually central, spherical double-membrane container of chromatin (DNA);has large pores |
Houses the genetic code, which in turn dictates protein synthesis, thereby playing an essential role in other cell activities, namely cell transport, metabolism, and growth |
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Mitochondria |
Tiny membranous capsule surrounding an inner, highly folded membrane embedded with enzymes,has small ringlike chromosome |
Catabolism; adenosine triphosphate synthesis, a cells "power plant" |
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Peroxisomes |
Tiny membranous bags containing enzymes |
Enzymes detoxify harmful substances in the cell |
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Proteasomes |
Hollow protein cylinders with embedded enzymes |
Destroys misfolded or otherwise abnormal proteins manufactured by the cell; a quality control mechanism for protein synthesis |
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Lysomone |
Tiny membranous bags containing enzymes |
Digestive enzymes breakdown defective cell parts and ingested particles; a cells "digestive system" |
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Golgi Apparatus |
Stack of flattened sacs (cisternae) surrounded by vesicles |
Synthesizes carbohydrate, combines it with protein and package the product as globules of glycoproteins. |
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Ribosomes |
Small particles assembled from two tiny subunits of rRNA and protein |
Site of protein synthesis, a cells "protein factories" |
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Smooth Endoplasmic Reticulum |
More tubular in structure and lacks ribosomes on its surface |
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Rough Endoplasmic Reticulum |
Broad, flattened sacs that extend outward from the boundary of the nucleus. RER sacs are dotted with innumerable small granules called ribosomes. |
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Plasma Membrane |
Phospholipid bilayer reinforced with cholesterol and embedded with protein and other organic molecules |
Protein molecules embedded in plasma membrane perform various functions |
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Cilia |
Moderate to long hairlike extensions of plasma membrane, supported internally by cylindrical formation of microtubules, sometime with attached molecular motors. |
Cilia move substances over the cell surface or detach changes outside the cell. |
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Microvilli |
Short fingerlike extensions of plasma membrane supported internally by microfilaments |
Tiny finger like extensions that increase cells absorptive surface area. |
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Centrioles |
A pair of cylindrical structures |
Appears as two dots located near the nucleus. |
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Centrosomes |
Reason of cytoskeleton that includes two cylindrical groupings of microtubules called centrioles. |
Acts as the microtubule-organizing center of the cell; centriole assist in forming and organizing microtubules |
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Microtubules |
The thickness of the sale fibers, hollow tube's made of proteins subunits arranged in a spiral fashion |
Sometimes called the "engines" of the cell because they often move things around in the cell-or even causes movement of the entire cell. |
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Intermediate filaments |
Twisted protein strands that are slightly thicker than microfilaments |
They act as the tendons and ligaments of the cell, holding the cell together as it is pushed and pulled |
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Microfilaments |
The smallest cell fiber |
Often serve as part of our "cellular muscles". They are made of thin, twisted strands of protein molecules. |
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Nucleolus |
Dense area of chromatin and related molecules within the nucleus |
Side of formation of ribosome subunits |
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Cytoskeleton |
Network of interconnecting flexible filaments, stiff tubules, and molecular motors within the cell |
Supporting framework of the cell and it's organelles, functions in the cell movement; forms cell extensions |
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Primary Cilium |
Lacks the center pair of microtubules and certain motor molecules, such as dynein |
Often act as sensory organelles that permit sensations such as vision, hearing and balance. |
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Cytosol |
A watery fluid, or intracellular fluid. |
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