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33 Cards in this Set
- Front
- Back
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outer boundary of a cell which regulates what can leave and enter the cell
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plasma membrane
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a membrane that is able to expel or admit particles used by cell
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selectively permeable membrane
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what is plasma membrane made up of?
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lipid layer, phospholipid
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Structure of plasma membrane
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polar head 0
phosphate group l fatty accids / \ non-polar |
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random movement of ions and other particles from an area of higher concentration to low concentration; througth air, water and other liquids, nad across membrane
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diffusion
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point reached when the no. of particles entering and leaving a region are equal
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dynamic equilibrium
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diffusion of water in and ot of cells
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osmosis
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no energy required; naturally happens
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passive transport
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membrane proteins that helps the passage of particles
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transport proteins
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use if transport proteins to help passage of particles across membrane.
greater concentration -> lower concentration |
facilitated diffusion
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provide water filled passage of particles through small dissolved particles
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channel proteins
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changes shape to allow certain molecules to cross the plsama membrane
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carrier proteins
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open to allow passage of particles when "signal" molecules combines with the gate.
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gate proteins
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energy required; from low -> high
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active transport
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process which the plasma membrane engulfs and then take substances from a cell's environment (inside cytoplasm)
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endocytosis
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form of endocytosis in which solid chunks of material are taken in is
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phagocytosis
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liquid droplets taken in is
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pinocytosis
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cell products or wastes are enclosed in vesicles and released to the surrounding (outside cytoplasm)
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exocytosis
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contain chloropyll and otherpigments required for photsynthesis
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chloroplast
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support, protection
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cell wall
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cell reproduction
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centrioles
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metabolism
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cytoplasm
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intracellular transport of proteins (rough and smooth); smooth enzymes break down substances
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endoplasmic reticulum
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modification and packaging of some proteins; in plants , secreton and processing of carbohydrates
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golgi bodies
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digestion within cells
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lysosomes
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movement; support
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microfilaments
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movement; support
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microtubules
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break down organic molecules to release energy for cell reaction
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mitochondria
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production of ribosomes
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nucleolus
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control of cellular activities and reproduction
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nucleus
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boundary; regulates passage of materials into and out of the cells
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plasma membrane
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protein synthesis
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ribosomes
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storage, digestion, maintenence of osomotic balance
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vacuoles
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