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9th cell structures

QuestionAnswer
What is a cell? Basic unit of all forms of life.
What is a cell theory? Idea that all living things are composed of cells,cells are the basic unit of structure and function in living things, and new cells are produced from existing cells.
What is a nucleus? In cells stucture that contain s the cell's genetic material and controls the cll's activities.
What is a eukaryote? Organism whose cells contian nuclei.
What is a prokaryote? Unicellular organism lacking a nucleus.
What is a organelle? Specialled structures that performs important cellular functions within a eukaryotic cell
What is a cytoplasm? Material inside the cell membrane- not including the nucleus.
What is a nuclearar envelope? Layers of two membranes that surrounds the nucleus of a cell.
What is a chromatin? Granular material visible within the nucleus.
What is a chromosome? Threadlike struvture within the nucleus containing the genetic information that passed from one generation of the cells to the nexts.
What is a nucleolus? Small,dense region within most nuclei in which the assembly of protien begins.
What is a ribosome? Small particles in the cells in which protiens are assembled; made of RNA and protien.
What is a endoplasmic reticulum? Internal membrane system in cells in which lipid components of the cell membrane are assembled and protiens are modified.
What is Golgi apparatus? Stacks of membranes in the cells that modifies, sorts, and packages protiens from the endoplasmic reticulum.
What is a lysosome? Cell organelle filled with enzymes needed to break down certian materials in the cells.
What is a vacuole? Cell organelle that stores material such as water, salts, protiens, carbohtdrates.
What is a mitochondrion? Cell organelle that cinverts to chemical energy stored in food into compounds that are more convenient for the cell to use.
What is a Chloroplast? Organelle found in cells of plants and some other organism that captures the energy from the sun light and converts into chemical energy.
What is a cytoskeleton? Network of protien filaments within some cells that helps the cells maintianits shape aand is invoild with many forms of cell movemoent.
What is centriole? One of two tiny structures located in the cytoplasm of animal cells near the nuclear envepole.
What is cell membrane Thin, flexible barrier around a cell; regulates what enters and leaves the cell.
What is cell wall? Strong supporting layer around the cell membrane in plants, algea, and some bacteria.
What is a lipid bilayer? Double-layered sheet that form the core of nearly all cell membranes.
What is concentration? The mass os the solute in a given volume of solution, or mass/volume.
What is diffusion? Process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated.
What is equilibrium? When the concentration of a solute is the same throughout a solution.
What is a osmosis? Diffusion of water through a selectively permeable membrane
What is isotonic? When the concentration of two solutions is the same.
What is hypertonic? When comparing two solutions, the solutionwith lesser concentration of solutes.
What is facilitated diffusion? Movement of specific molecules across cell membrane through protien channels
What is active transport? Energy-requiring process that moves material across a cell membrane againts a concentration difference
What is endocytosis? A process by which a cell takes material into the cell by infolding of the cell membrane.
What is phagocytosis? A process in which extension of cytoplasm surround and engulf large particles and take them into a cell.
What is pinocytosis? A process by which a cell takes in liquid from the surrounding environment.
What is exocytosis? A process by which a cell releases large amounts of material.
What is cell specialization? Cells throughout an organism can develop in differnet ways to perform different tasks.
What is tissue? Is a group of similar cells that perform a particular function.
What is organ? Many groups of tissue that work together.
What is organ system? A group of organs that work together to perform a specific function.
Created by: kimbetcher
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