Module #6 The Cell


Terms in this set (...)

The transport of dissolved substances into cells.
The breakdown of absorbed substances.
The breakdown of food molecules with a release of energy.
The removal of soluble waste materials.
The removal of nonsoluble waste materials.
The release of biosynthesized substances.
Maintaining the status quo.
Producing more cells.
The study of cells
cell wall
A rigid structure on the outside of certain cells, usually plant and bacteria cells.
middle lamella
The thin film between the cell walls of adjacent plant cells.
plasma membrane
The semipermeable membrane between the cell contents and either the cell wall or the cell's surroundings
A jellylike fluid inside the cell in which the organelles are suspended
Substances in which at least one atom has an imbalance of protons and electrons.
cytoplasmic streaming
The motion of cytoplasm in a cell that results in a coordinated movement of the cell's contents.
The organelles in which nutrients are converted to energy.
The organelle in animal cells responsible for hydrolysis reactions that break down proteins, polysaccharides, disaccharides, and some lipids.
Non-membrane-bounded organelles responsible for protein synthesis.
Endoplasmic Reticulum
An organelle composed of an extensive network of folded membranes that performs several tasks within a cell.
Rough ER
ER that is dotted with ribosomes
Smooth ER
ER that has no ribosomes
Organelles that store starches or oils
Organelles that contain pigments used in photosynthesis
central vacuole
A large vacuole that rests at the center of most plant cells and is filled with a solution that contains a high concentration of solutes.
Waste vacuoles
Vacuoles that contain the waste products of digestion
The process by which a cell engulfs foreign substances or other cells.
Phagocytic vacuole
A vacuole that holds the matter which a cell engulfs.
pinocytic vacuole
Vesicle formed at the plasma membrane to allow the absorption of large molecules.
secretion vacuole
Vesicle that holds secretion products so that they can be transported to the plasma membrane and released
Golgi Bodies
The organelles where proteins and lipids are stored and then modified to suit the needs of the cell.
Spiral strands of protein molecules that form a tubelike structure
nuclear membrane
A highly-porous membrane that separates the nucleus from the cytoplasm
Clusters of DNA, RNA, and proteins in the nucleus of a cell
A network of fibers that holds the cell together, helps the cell to keep its shape, and aids in movement
Fine, threadlike proteins found in the cell's cytoskeleton
intermediate filaments
Threadlike proteins in the cell's cytoskeleton that are roughly twice as thick as microfilaments
A lipid in which one of the fatty acid molecules has been replaced by a molecule that contains a phosphate group.
passive transport
Movement of molecules through the plasma membrane according to the dictates of osmosis or diffusion.
active transport
Movement of molecules through the plasma membrane (typically opposite the dictates of osmosis or diffusion) aided by a process that requires energy.
isotonic solution
A solution in which the concentration of solutes is essentially equal to that of the cell which resides in the solution
hypertonic solution
A solution in which the concentration of solutes is greater than that of the cell that resides in the solution
Collapse of a walled cell's cytoplasm due to a lack of water
The rupturing of a cell due to excess internal pressure.
hypotonic solution
A solution in which the concentration of solutes is less than that of the cell that resides in the solution
activation energy
Energy that is necessary to get a chemical reaction going