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idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells
short, hair-like structures made of microtubules that enable movement of cells or movement of materials outside a cell
process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated
a system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids
A type of cell with a membrane-enclosed nucleus and membrane-enclosed organelles. Examples of organisms with these cells are protists, plants, fungi, and animals.
the process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out
long, thin, whip-like structures, with a core of microtubules, that enable some cells to move
stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum
describes a solution whose solute concentration is higher than the solute concentration inside a cell; net water flow is going out of a cell
when comparing two solutions, the solution with the lesser concentration of solutes; net water flow is going into a cell
having a solute concentration equal to that of another solution; net water flow is in equilibrium
membrane-bound sac(organelle) containing digestive enzymes that can break down proteins, nucleic acids, and polysaccharides
solid rod of protein, thinner than a microtubule, that enables a cell to move or change shape; found in eukaryotic cells
straight, hollow tube of proteins that gives rigidity, shape, and organization to a cell
The organelle where ribosomes are made, synthesized and partially assembled, located in the nucleus
specialized structure that performs important cellular functions within a eukaryotic cell (prokaryotic cells have some)
diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal
thin flexible barrier that regulates what enters and exits the cell; composed of two layers of lipids
A type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles; found only in the domains Bacteria and Archaea.
a property of cell membranes that allows some substances to pass through, while others cannot
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