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Chapter 5 Vocabulary
Biology Chapter 5 Vocabulary
12
Biology
10th Grade
03/05/2013

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Term
Plasma membrane (cell membrane)
Definition
Keeps cell separate from its environment and allows some things to move in and out.
Term
Phospholipid bilayer
Definition
Makes up the cell membrane.
Term
Proteins
Definition
Part of the cell membrane used to allow molecules in and out of the cell.
Term
Cholesterol
Definition
Makes cell membranes stronger; only in animal cells.
Term
Diffusion
Definition
Moving from high concentration to low concentration.
Term
Homeostasis
Definition
Keep balance, steady.
Term
Dynamic equilibrium
Definition
Balanced, same all throughout.
Term
Osmosis
Definition
Diffusion through a membrane.
Term
Isotonic
Definition
Solutes inside and outside of a cell are equal.
Term
Hypotonic
Definition
More solute outside the cell,water moves in and swells.
Term
Hypertonic
Definition
More solute outside the cell, water moves out and shrinks.
Term
Active transport
Definition
Uses energy to move larger molecules in and out of the cell.
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