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Selectively Permeable -or- Semi-Permeable (define)
The cell controls what goes in or out of the cell membrane so that the cell maintains homeostasis.
Endocytosis (define)
The movement of substances
into
a cell by use of a vesicle.
Exocytosis (define)
The movement of a substance
out of
a cell by use of a vesicle.
T/F Endocytosis and Exocytosis require energy.
True
False
True.
The two types of endocytosis are:
Pinocytosis
Phagocytosis
Pinocytosis (define)
"Cell drinking"
The movement of fluids and dissolved solutes into the cell.
Phagocytosis (define)
"Cell eating"
The movement of a large particle or even whole organisms into the cell.
Osmosis (define)
The diffusion of water through a selectively permeable membrane.
T/F Osmosis requires energy.
True
False
False.
Diffusion (define)
Movement of a substance from high concentration to low concentration.
Active Transport
Movement
against
concentration gradient.
Requires energy.
Passive Transport
Movement
with
concentration gradent.
Does not require energy.
Equilibrium
A condition where the concentration of a substance is the same throughout a space.
Hypertonic
A fluid with
higher
concentration of substances than the cell.
Cell will shrink.
Hypotonic
A fluid with
lower
concentration of substances than the cell.
Cell will swell.
Isotonic
A fluid with the same concentration of substances as the cell.
Facilitated Diffusion
Substances are moved across a membrane through carrier proteins.
T/F Facilitated diffussion requires energy.
True
False
False.
Carrier Protein
A protein that carries a substance across the cell membrane.
Solvent (define)
The substance soing the dissolving.
Solute (define)
The substance being dissolved.
Author
HannahD
ID
122737
Card Set
BiologyReview5
Description
Biology review
Updated
2011-12-11T21:15:46Z
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