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Ch. 4

TermDefinition
diffusion The movement of particles from an area that is more crowded to an area that is less crowded.
equilibrium When the system is balanced and there is the same amount of particles inside and outside of the cell.
osmosis The movement of water across a selectively permeable membrane.
selectively permeable membrane A membrane that allows somethings to pass through it and others can not.
passive transport Type of transport in which particles move from an area of high concentration to low concentration and no energy is used
active transport Type of transport in which particles move from an area of low concentration to high concentration and lots of energy is used.
facilitated diffusion When particles move into or out of the cell through protein channels WITHOUT using energy.
endocytosis When the cell membrane wraps around a particle and brings it into the cell.
exocytosis When vesicles move materials to the cell membrane and materials are released from the cell.
hypertonic A type of solution where there is a high concentration outside of the cell, water moves out of the cell and the cell SHRINKS.
hypotonic A type of solution where there is a low concentration outside of the cell, water moves into the cell and the cell SWELLS.
isotonic A type of solution where the concentration is the same inside and outside of the cell and the cell stays the same.
photosynthesis Process that occurs in chloroplasts in which plants use energy from the sun, carbon dioxide and water to make food and oxygen.
cellular respiration Process that occurs in the mitochondria in which oxygen and food is broken down into energy (ATP), carbon dioxide and water.
fermentation Process that occurs in place of cellular respiration when carbon dioxide is used instead of oxygen to make energy. Lactic acid is made during this process.
ATP Energy molecule made by cells
cell cycle 3 stages that lead to the creation of a new cell. Interphase, mitosis, and cytokinesis.
interphase The first stage of the cell cycle in which the cell grows and chromosomes are copied.
mitosis The second stage of the cell cycle that consists of PMAT; prophase, metaphase, anaphase, telophase
cytokinesis The third stage of the cell cycle in which two new daughter cells are made.
chromosome Structures of DNA
selectively permeable Describes a membrane that lets some things in and some things out
equilibrium When the number of particles is about the same on the inside and outside of the cell
Created by: figueroad