Vocabulary Review Cells
Process by which a cell engulfs droplets of fluid from its surroundings Pinocytosis
Physiological process by which substances may move through a cell membrane; involves the formation of tiny, cytoplasmic granules Endocytosis
Diffusion of water through a selectively permeable membrane Osmosis
Process that requires an expenditure of energy to move a substance across a cell membrane Active Transport
Condition in which a solution contains a lesser concentration of dissolved particles than the solution to which it is compared Hypotonic
Cytoplasmic organelle that consists largely of RNA and functions in the synthesis of proteins Ribosome
Process by which body cells divide to form two identical cells Mitosis
Cytoplasmic organelle that contains digestive enzymes Lysosomes
A state of balance between two opposing forces Equilibrium
Membranous cytoplasmic sac formed by an action of the cell membrane Vesicle
Process by which a cell engulfs and digests solid substances Phagocytosis
Nuclear material that gives rise to chromosomes during mitosis Chromatin
Facilitated Diffusion Diffusion in which substances are moved through membranes from high to low concentration by carrier molecules Facilitated Diffusion
The contents of a cell surrounding its nucleus (cytosol + organelles) Cytoplasm
A cellular organelle that is enclosed by a double-layered membrane and contains DNA – “Brains of the operation” Nucleus
Cellular organelle consisting of two centrioles; form spindle for mitosis Centrosome
A small structure that occurs within the nucleus of a cell and contains RNA and proteins Nucleolus
Random movement of molecules from high to low concentration Diffusion
Rod-like structure that appears in the nucleus during mitosis; contains genes responsible for heredity Chromosome
Open to passage or penetration Permeable
Condition in which a solution contains a greater concentration of dissolved particles than the solution with which it is compared Hypertonic
Process by which cells become structurally and functionally specialized during development Differentiation
A solution that has the same concentration of dissolved particles as the solution with which it is compared Isotonic
Cytoplasmic organelle that contains enzymes responsible for aerobic respiration; produces ATP ~ “powerhouse” Mitochondrion
Endoplasmic reticulum Cytoplasmic organelle composed of a system of interconnected membranes, tubules, and vesicles for transporting materials Endoplasmic reticulum
A cytoplasmic organelle that functions in preparing cellular products for secretion Golgi apparatus
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