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33 Cards in this Set

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outer boundary of a cell which regulates what can leave and enter the cell
plasma membrane
a membrane that is able to expel or admit particles used by cell
selectively permeable membrane
what is plasma membrane made up of?
lipid layer, phospholipid
Structure of plasma membrane
polar head 0
phosphate group l
fatty accids / \
non-polar
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
diffusion
point reached when the no. of particles entering and leaving a region are equal
dynamic equilibrium
diffusion of water in and ot of cells
osmosis
no energy required; naturally happens
passive transport
membrane proteins that helps the passage of particles
transport proteins
use if transport proteins to help passage of particles across membrane.

greater concentration -> lower concentration
facilitated diffusion
provide water filled passage of particles through small dissolved particles
channel proteins
changes shape to allow certain molecules to cross the plsama membrane
carrier proteins
open to allow passage of particles when "signal" molecules combines with the gate.
gate proteins
energy required; from low -> high
active transport
process which the plasma membrane engulfs and then take substances from a cell's environment (inside cytoplasm)
endocytosis
form of endocytosis in which solid chunks of material are taken in is
phagocytosis
liquid droplets taken in is
pinocytosis
cell products or wastes are enclosed in vesicles and released to the surrounding (outside cytoplasm)
exocytosis
contain chloropyll and otherpigments required for photsynthesis
chloroplast
support, protection
cell wall
cell reproduction
centrioles
metabolism
cytoplasm
intracellular transport of proteins (rough and smooth); smooth enzymes break down substances
endoplasmic reticulum
modification and packaging of some proteins; in plants , secreton and processing of carbohydrates
golgi bodies
digestion within cells
lysosomes
movement; support
microfilaments
movement; support
microtubules
break down organic molecules to release energy for cell reaction
mitochondria
production of ribosomes
nucleolus
control of cellular activities and reproduction
nucleus
boundary; regulates passage of materials into and out of the cells
plasma membrane
protein synthesis
ribosomes
storage, digestion, maintenence of osomotic balance
vacuoles