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Chapter 7 Vocab

QuestionAnswer
Cell Collection of living matter enclosed by a barrier that separates the cell form its surroundings; basic unit of all forms of life.
Chromatin Granular material visible within the nucleus; consists of DNA tightly coiled around proteins.
Chromosome Threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next.
Eukaryote Organism whose cells contain nuclei.
Membrane Thin bilayer of fat that regulates what enters and exits the cell. Selectively permeable.
Nucleolus Small, dense region in the nucleus where the ribosomes are assembled.
Nucleus Contains nearly all the cell's DNA which contains the instructions for making proteins. Surrounded by nuclear envelope.
Organelle Specialized structure that performs important cellular function within a eukaryotic cell.
Prokaryote Unicellular organism lacking a nucleus.
Active Transport Energy requiring process that moves material across a cell membrane against a concentration difference.
Concentration Gradient The way molecules diffuse from an area of high concentration to low concentration.
Cytolysis The bursting or rupturing of a cell when it is to full of liquid from a hypotonic solution.
Diffusion Process by which molecules tend to move from an area of high concentration to an area of low concentration.
Endocytosis Process by which a cell takes material into the cell by infolding of the cell membrane.
Equilibrium When the concentration of a solute is the same throughout a solution.
Exocytosis Process by which a cell releases large amounts of material.
Facilitated diffusion Movement of specific molecules across cell membranes through protein channels.
Hypertonic When comparing two solutions, the solution with the greater concentration of solutes.
Hypotonic When comparing two solutions, the solution with the lesser concentration of solutes.
Ion Channel Proteins that act as straws and allow particles to go against the concentration gradient.
Isotonic When the concentration of two solutions is the same.
Osmosis diffusion of water through a selectively permeable membrane.
Passive Transport Transport in which molecules go with the concentration gradient. Requires no energy.
Phagocyte A cell that engulfs and uses food.
Phagocytosis Process in which extensions of cytoplasm surround and engulf large particles and take them into the cell.
Pinocytosis Process by which a cell takes in liquid from the surrounding environment.
Plasmolysis The shrinking of a cell due to loss of liquid by osmosis (in a hypertonic solution).
Sodium/Potassium Pump A protein channel that allows potassium ions into a cell and sodium ions out using ATP for energy.
Turgor Pressure The pressure in a cell by water in a vacuole, supporting the cell's shape.
Vesicle A small membrane enclosed sac in a cell that stores molecules. One type is a vacuole.
Created by: nbas_finest
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