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Unit 3:Cells

Terms for Cells

TermDefinition
Cell The basic unit of all living things
Organism Any living thing
Cell Membrane Protective layer of the cell. Acts as a barrier from the outside. (fence)
Cytoplasm The fluid that holds all the organelles of the cell (jello)
Organelle Small body in a cells cytoplasm that is specialized to perform a specific function
Nucleus Organelle of the cell that provides instructions for all the cells organelles.
Prokaryote Single celled organism that does not have a nucleus or membrane bound organelles (bacteria)
Eukaryote An organism that is made up of cells that contain their DNA in a nucleus (multi-celled organisms)
Atoms The smallest unit of an element that maintains the properties of that element
Molecule a group of atoms that are held together by chemical forces
Lipid A fat molecule that has similiar properties. They do not mix with water
Protein A molecule that is made up of smaller molecules called amino acids. (Meat and peanut butter)
Carbohydrate Molecules that include sugars, starches, and fiber. (good for energy)
Nucleic Acid molecule that carries information to the cells. (DNA)
Phospholipid A lipid that contains phosphorous
Cytoskeleton Gives shape and support to the cell. (Bones)
Mitochondrion The organelle that is the site of cellular respiration, which releases energy for cell use. (battery, power plant)
Ribosome Makes proteins for the cells with amino acids
Endoplasmic Reticulum (ER) assists in the production, processing, and transport of proteins. (roads)
Golgi Complex Packages and disstributes material, such as proteins. (UPS/Mail)
Cell Wall Rigid structure that surrounds the cell membrane only found in plant cells.
Vacuole Fluid filled vesicle found in the cells of most animals, plants, and fungi. (Storage) Stores all enzymes, wastes, nutrients and water
Chloroplast Organelles in plant cellls only that use photosynthesis to make their food. Green pigment called Chlorophyll.
Lysosome Produces enzymes that digest wastes, cell parts, and foreign invaders. (Recycling Center)
Tissue A group of similiar cells that perform a common function. (muscle tissue)
Organ A structure made up of a collection of tissues that carry out a specialized function. (heart, lungs, brain)
Organ System a Group of Organs that work together to perform body functions. (circulatory system, nervous system)
Structure The arrangements of parts in in an organism or object
Function the activity of each part ion an organism
Homeostasis The maintenance of an internal balance of conditions in a changing external environment. Creating balance.
Photosynthesis The process used by plants to make their own food.
Cellular respiration Process by which cells use oxygen to produce energy from food
Binary fission type of asexual reproduction where prokaryotic cells divide into 2 cells
Mitosis when chromosome copies are separated and the nucleus and cell divide to form 2 identical cells
Passive transport The movement of particles across a cell membrane without the use of energy by the cell
Diffusion The movemnet of molecules from areas of high concentration to low concentration
Osmosis The diffusion of water through a semi-permeable membrane
Active transport The movement of particles where the cell must use energy
Endocytosis When a cell uses energy to surround a particle and enclose it and bring it INTO the cell
Exocytosis Particles are enclosed and RELEASED from the cell
Cell Theory 1. The cell is the basic unit of all organisms 2. All organisms are made of 1 or more cells 3. All cells come from pre-existing cells
Created by: palmer_wwms