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Bio cell transport

Quiz Friday October 31st

QuestionAnswer
What is diffusion? The process by which molecules move from high concentration to lower concentration.
What is equilibrium? When the concentration is the same throughout a system, but molecular movement does not stop.
What is passive transport? Process where random movement lets substances diffuse across cell membranes without using energy.
What is osmosis? The diffusion of water through a selectively permeable membrane.Water will move from an area of high water concentration to area of low water.
What are the 3 cell conditions due to the movement of water? *Hypertonic cells * Isotonic cells *Hypotonic cells
Hypertonic cells? Cells environment has a higher concentration of solutes than inside the cell. "Hyper" meaning higher
Isotonic Cells? Cells environment has the same concentration of solutes as inside the cell. "Iso" meaning same.
Hypotonic cells? Cells environment has a lower concentration of solutes than inside the cell. "Hypo" meaning lower
What is the result of hypertonic cells? Water rushes out of cell and into the environment, causing the cell to shrivel.
What is the result of Isotonic cells? Perfect Equilibrium, with no movement of water in or out of the cell.
What is the result of hypotonic cells? Water rushes into the cell, causing it to swell and experience lysis (explosion/breaking apart)
What is facilitated diffusion? Diffusion of certain molecules across cell membranes via. protein channels (example: glucose moving into red blood cells).
What is the shortcut? Facilitated diffusion. For example, glucose can't diffuse across the lipid bilayer on its own so it moves throughout the protein channels instead: uses no energy.
What is active transport? Energy using process that moves materials across a cell membrane against a concentration difference (rowing against current)
What does active transport help? Helps cells move materials in the opposite direction. (Against a concentration) difference
What is active transport done by? Transport proteins found in the membrane itself.
What are the types of active molecular transport?---What are the two processes used to transport large molecules across the cell membrane? Exocytosis and Endocytosis
What is exocytosis? Packaging and removal of wastes from the cell. The membrane of a vacuole containing waste fuses with the cell membrane and forces the contents out of the cell.
What is endocytosis? The process of taking outside material into the cell by means of infoldings, or pockets, of the cell membrane.
Created by: kaylac1051
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