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Biology Chapter 4

Biology Chapter 4 Section 1 and 2 Vocab

TermDefinition
cell in biology, the smallest unit that can perform all life processes; cells are covered by a membrane and contain DNA and cytoplasm
cell theory the theory that states that all living things are made up of one or more cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells
plasma membrane the cell's outer boundary
cytoplasm the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus
cytosol the soluble portion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membranes
nucleus in a eukaryotic cell, a membranebound organelle that contains the cell's DNA and that has a role in processes such as growth, metabolism, and reproduction
prokaryote a single-celled organism that has no nucleus and has no membranebound organelles; examples include bacteria and archaea
eukaryote an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; eukaryotes include animals, plants, and fungi but not bacteria or archea
organelle one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function
tissue a collection of specialized cells and cell products that perform a specific function
organ a collection of tissues that carry out a specialized function of the body
organ system a group of organs
Created by: frankk17
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