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Chapter 8
Biology words
10
Biology
9th Grade
03/04/2013

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Term
Phospholipid
Definition
A specialized lipid made of a phosphate "head" and fatty acid "tail".
Term
Lipid Bilayer
Definition
When phospholipids form a double layer it is called.
Term
Equilibrium
Definition
This is a state where a space is filled evenly.
Term
Concentration gradient
Definition
Is when one area has a higher concentration than the other area.
Term
Diffusion
Definition
When one area of high concentration moves to an area with lower concentration.
Term
Osmosis
Definition
A type of passive transport that keeps the cell functional.
Term
Sodium-potassium pump
Definition
Is one of the most important carrier proteins in animal cells.
Term
Signal
Definition
This is used when cell communicate and coordinate activity.
Term
Receptor Proteins
Definition
This helps parts get all the important signals rather than all the signals that are sent to them.
Term
Second Messanger
Definition
Acts as a signal molecule within the cell and causes changes to the cytoplasm and nucleus.
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