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22 Cards in this Set

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a globular protein that links into chains, two of which twist helically about each other, forming microfilaments in muscle and other contractile elements in cells.
Actin
the complex of DNA and proteins that makes up a eukaryotic chromosome. When the cell is not dividing, this exists as a mass of very long, thin fibers that are not visible with a light microscope
Chromatin
a structure in an animal cell composed of cylinders of microtubule triplets arranged in a 9 + 0 pattern. An animal cell usually has a pair of centrioles involved in cell division.
Centriole
material present in the cytoplasm of all eukaryotic cells, important during cell division; the microtubule-organizing center
Centrosome
the entire contents of the cell, exclusive of the nucleus, and bounded by the plasma membrane
Cytoplasm
a circular flow of cytoplasm, involving myosin and actin filaments, that speeds the distribution of materials within cells
Cytoplasmic Streaming
the semifluid portion of the cytoplasm
Cytosol
a type of intercellular junction in animal cells that functions as an anchor
Desmosome
the collection of membranes inside and around a eukaryotic cell, related either through direct physical contact or by the transfer of membranous vesicles
Endomembrane System
a type of cell with a membrane-enclosed nucleus and membrane-enclosed organelles, present in protests, plants, fungi, and animals
Eukaryote
a type of intercellular junction in animal cells hat allows the passage of material or current between cells.
Gap Junction
a protein covalently attached to a carbohydrate
Glycoprotein
a type of protein filament that interacts with actin filaments to cause cell contraction
Myosin
a dense region of DNA in a prokaryotic cell
Nucleoid
a specialized structure in the nucleus, formed from various chromosomes and active in the synthesis of ribosomes
Nucleolus
a microbody containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading hydrogen peroxide
Peroxisome
a type of endocytosis involving large, particulate substances
Phagocytosis
an open channel in the cell wall of plants through which strands of cytosol connect from adjacent cells.
Plasmodemata
a type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles; found only in the domains Bacteria and Archaea
Prokaryote
a cell organelle constructed in the nucleolus and functioning as the site of protein synthesis in the cytoplasm; consists of rRNA and protein molecules, which make up two subunits
Ribosome
a membrane that encloses the central vacuole in a plant cell, separating the cytosol from the cell sap
Tonoplast
a sac made of membrane inside the cells
Vesicle