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Cell Transport

Terms in this set (23)

simple diffusion
requires no energy , molecules move from area of HIGH to LOW concentration
diffusion
passive process , no energy , natural kinetic energy , diffusion through a membrane ,
solute
moves down the concentration gradient
solution
mixture of solid in liquid example: salt water
Solute and Solvent
Solute is what is being dissolved and Solvent does the dissolving
Osmosis
Diffusion of water across a membrane , moves from HIGH water concentration to LOW water concentration , LOW water solute concentration to HIGH solute concentration
isotonic
a solution whose solute concentration is the same as the solute concentration inside the cell
hypotonic
a solution whose solute concentration is LOWER than the solute concentration inside a cell
hypertonic
a solution whose solute concentration is HIGHER then the solute concentration inside a cell
Cell in Isotonic solution
the cell is at Equilibrum , Equilibrum means equal concentration inside and outside the cell , water flows in both directions outside and inside the cell
Hypotonic solution
the water is going inside the cell , water is attracted to the solute inside the cell
Hypertonic solution
the water is going out of the cell , the solute concentration is greater outside the cell
Cytolysis
the destruction of a cell , cells swell and burst
Plasmolysis
the shrinking of a cell , cell shrinks and shrivels
Passive Transport
does NOT require energy , uses transport proteins to move HIGH to LOW concentration
4 roles Cell Membrane Function
Structure , Recognition , Communication , Transport
Active Transport
requires energy of ATP , moves materials from low to high concentration , against concentration gradient
Active Transport Exocytosis
type of active transport , moving things out , molecules are moved out of the cell by vesiculs , this is how hormones are secreted and how nerve cells communicate with each other
Active Transport Endocytosis
large molecules move materials into the cell by one of three forms of endocytosis
pinocytosis
most common form of endocytosis , cell forms an ivagination , materials dissolve in water to be brought into cell ,called "Cell Drinking"
Recepter Mediated
some integral proteins have receptors on their surface to recognize and take in horomones , cholestrol, etc
Phagocytosis
used to engulf large particles such as food, bacteria, etc, into vesicles , called "cell eating"
Why is it called phagocytosis?
macrophage , "immunity" cell , example white blood cell
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