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Biology Chap. five

i'm coool.

QuestionAnswer
what are cells? cells are the basic units of structure and function in a living thing.
what is cell theory? cell theory is understanding that all living things are composed of cells and that all cells come from preexisting cells.
what three things states a cell theory? 1. all living things are composed of cells. 2. cells are the basic units of structure and function in living things. 3. all cells come from preexisting cells.
what are the basic structures of animals, plants, and related organisms? 1. the cell membrane. 2. the nucleus. 3. the cytoplasm.
what is cell membrane? cell structure that regulates the passage of materials between the cell and its environment.
what is cell what? cell structure that surrounds the cell membrane for protection and support in plants, algae, and some bacteria.
what is the nucleus? controls the cells activities and contains DNA.
what are prokaryotes? singled celled organism whose cells do not have a nucleus.
what are eukaryotes? organism made up of cells that have a nucleus.
what is nuclear envelope? membrane that surrounds the nucleus of a cell.
what is nucleolus? cell structure that contains RNA and proteins.
what is chromosomes? threadlike structure in a cell that contains the genetic information that is passed on from one generation of cells to the next.
what is cytoplasm? area between the nucleus and cell membrane of a cell.
what is organelles? tiny structure that performs a specialized function.
what is mitochondrion? organelle that changes chemical energy stored in food into compounds that can be used by the cell.
what is chloroplast? organelle that converts sunlight into chemical energy in plants.
what is ribosomes? organelles in which proteins are made.
what is endoplasmic reticulum? complex network that transports materials throughout the inside of the cell.
what is Golgi apparatus? organelles that modifies, collects, packages, and distributes molecules made at one location of the cell and used at the other.
what is lysosomes? organelles that contains chemicals and enzymes necessary for digesting certain materials in the cell.
what is vacuoles? organelle that stores materials such as water, salts, proteins, and carbohydrates.
what is plastids? plant cell organelle involved in the storage of food and pigments.
what is cytoskeleton? framework of the cell composed of a variety of filaments and fibers that support cell structure and drive cell movement.
what is diffusion? the process by which molecules of a substance move from areas of higher concentration of that substance to areas of lower concentration.
what is selectively permeable? description of a biological membrane that allows some substances to pass through but not others.
what is osmosis? diffusion of water molecules through a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
what is facilitated diffusion? diffusion of materials across a cell membrane assisted by carrier molecules.
what is active transport? the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
what is cell specialization? cell often uniquely suited to perform a particular function within the organism.
what is levels of organization in a multicellular organism? cells, tissues, organs, and organ systems that make up the organism.
what is organ? group of tissues that work together to perform a specific function.
what is organ system? group of organs that work together to perform a specific function.
Created by: 100001376368298
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