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Homeostasis and Cell Transport
CELLS
26
Biology
10th Grade
09/29/2009

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Term
Passive Transport
Definition

A form used to get things out of the cell without using energy

 

Term
Concentration gradient
Definition
An organelle that removes water from the cell 
Term
Equilibrium
Definition
concentration of molecules is equal throughout a space
Term
Diffusion
Definition
movement DOWN a conventrion gradient.
Term

Osmosis

Definition
a movement of molecules from a less concentrated solution into a more concentrated one
Term
Hypertonic 
Definition
makes a cell EXPAND OR  GET BIGGER
Term
Hypotonic 
Definition
makes a cell be NORMAL size
Term
Isotonic Solution
Definition
makes a cell be SHRINK OR BE LESS 
Term
Ion channel
Definition
transport protein through which ions can pass
Term
Carrier protein
Definition
proteins that transport a specific substance through the intracellular of a cell
Term
Facilitated diffusion
Definition
can not normally defuse through the membrane 
Term
Active Transport
Definition
a way to get things in and out of the cell that does use energy 
Term
Sodium-potassium pump
Definition
an example of a membrane pump AND A FORM OF ACTIVE TRANSPORT
Term
Endocytosis
Definition
the taking of stuff out of a cell 
Term
Exocytosis
Definition
When a substance is released from a cell through a vesicle. 
Term
Vesicle
Definition
the pouch that pinches off from the cell membrane and becomes a membrane bound organelle.
Term
Contractile vacuole
Definition
an organelle that removes water from a cell.
Term
Carrier Protein 
Definition
They help in faciltated diffusion by moving molecules around in a cell 
Term
ION CHANNEL 
Definition
complex of protein molecules in a cell membrane that forms a pore where ions can pass 
Term
ATP
Definition
a type of protein used in active tansport
Term
Phagocytosis
Definition
takes in large molecules for the cell 
Term
Pinocytoses
Definition
Takes in small lipids for the cell
Term
Plasmolysis
Definition
when water leaves the cell in osmosis and the cell shrinks from the cell walls 
Term
Cytolysis
Definition
Region of the cell in the membrane with liquid,organelles and membrane bound organelles.
Term
Turgon pressure
Definition
the pressure that water molecules export against the cell wall 
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