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22 Cards in this Set
- Front
- Back
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Cell Membrane
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separates the cell contents from surroundings, physical barrier, regulates passage of materials, has receptors for sensitivity, supports the internal structure
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Mitochondria
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site for the reactions for aerobic respiration, also contains small amounts of mitochondrial DNA inherited only from the mother
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Cytoskeleton
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a framework of micro-filaments and tubules to support the cell
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Nuclear Pores
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openings in the nuclear membrane through which large molecules can pass
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Nuclear Membrane
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double membrane separating the nucleus from the rest of the cell
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Nucleus
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contains most of the cell's DNA, site of the transcription stage of protein synthesis
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Nucleolus
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centre of nucleus, made up mostly of RNA
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Cytoplasm
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fluid in which the organelles of the cell are suspended
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Golgi Apparatus
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modifies and packages proteins for secretion from the cell
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Endoplasmic Reticulum
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membranous channels that store and transport materials; also provide a surface on which chemical reactions occur
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Ribosomes
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sites of the translation stage of protein synthesis
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fluid mosaic model
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membrane said to be fluid because the molecules of which it is made are constantly changing position and mosaic because it is made up of many different kinds of molecules
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hydrophilic
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water loving
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hydrophobic
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water hating
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channel proteins
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form a channel through the membrane through which ions, water and other small molecules can pass through
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diffusion
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the movement of molecules so they are evenly spread over the available space
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osmosis
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diffusion of water through a differentially permeable membrane from a region of higher water concentration to a region of lower water concentration
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facilitated diffusion
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substances move across the membrane with the concentration gradient through carrier proteins which change shape to release the molecule on the other side
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active transport
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same as facilitated diffusion, except going against the concentration gradient, therefore requiring energy
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endocytosis
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taking in liquids or solids through vesicular transport
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exocytosis
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when the contents of a vesicle are passed to the outside
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receptor proteins
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proteins in the cell membrane sensitive to certain molecules outside the cell and when those molecules are present they bind with the receptor protein to trigger changes within the cell
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