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Cells
Chapter 3
22
Nursing
Undergraduate 2
09/22/2014

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Term
Structure of plasma membrane of cell
Definition
phospholipid bilayer studded with proteins
Term
Function of plasma membrane of cell
Definition
Boundary of cell: carbohydrates and proteins on outer surface of cell membrane perform various functions
Term
Structure of ribosomes
Definition
Tiny particles, each are made of rRNA subunits
Term
Function of ribosomes
Definition
rough: receives and transports synthesised proteins
smooth:synthesises lipids and certain carbs
Term
Structure of golgi apparatus
Definition
stack of flattened membranous sacs
Term
Function of golgi apparatus
Definition
chemically process and package substances received from ER
Term
Function of mitochondria
Definition
Synthesis of ATP (power supply)
Term
Structure of mitochondria
Definition
own DNA. Enzymes embed a folded internal membrane. A membranous capsule covers the internal membrane
Term
Structure of lysosomes
Definition
membrane encasing hydrolysis enzymes
Term
Function of lysosomes
Definition
breaks up large molecules
Term
Structure of nucleus
Definition
Two membranes encapsulating DNA
Term
Function of nucleolus
Definition
form ribosomes by forming subunits
Term
describe diffusion
Definition
particle movement from high to low concentration through a membrane
Term
describe osmosis
Definition
selectively permeable membrane (which has at least one impermeant solute present) allows movement of water through
Term
describe filtration
Definition
movement of small solute particles and H2O through filtration membrane. Low to high conc. gradient
Term
3 types of active transport processes
Definition
ion pump, phagocytosis, pinocytosis
Term
describe ion pump
Definition
carrier protein molecule moves solute particles from high to low area concentrations
Term
describe phagocytosis
Definition
section of plasma membrane allows movement of a cell or large particles by trapping and pinching particle or other cell off into the cell
Term
describe pinocytosis
Definition
Section of plasma membrane pinches off to allow movement of fluid and dissolved molecules into cell
Term
which ions enter and exit Na-K pump and how many
Definition
3 Na ions out of cell, 2 K ions into cell
Term
describe process after large particle enter cell by phagocytosis
Definition
cytoskeleton of cell extends plasma membrane of cell, which forms a pocket to surround target called a vesicle. Target is pulled by cytoskeleton movement. Vesicle fuses with lysosomes to break down the target particle
Term
describe cholera
Definition
bacterial infection. Cell lining of intestines leak Cl-. H2O follows Cl- by osmosis. Severe diarrhoea, loss of body water
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