click below
click below
Normal Size Small Size show me how
Cells
vocab
Term | Definition |
---|---|
Cell Membrane | A protective layer that covers a cell's surface and acts as a barrier. Outer membrane controls movement in and out of cell. Has double layer-barrier |
Organelles | Small Bodies in a cell's cytoplasm that are specialized to perform a specific function. |
Cytoplasm | The region enclosed by the cell membrane that includes the fluid and the organelles of the cell. |
Nucleus | The center of a cell that contains the DNA in eukaryotic cells. Directs cell activities and is separated from cytoplasm by nuclear membrane. |
Prokaryotic | No nucleus, DNA in the cytoplasm, circular DNA. Examples: bacteria, & yeast |
Eukaryotic | Nucleus contains DNA, linear DNA, Examples: animal & plant cell, fungi. |
Bacteria | 1st cells on Earth, singles cell (unicellular), prokaryotic |
Cell | The smallest functional & structural unit of all living organisms. |
Tissue | A group of similar cells that perform a common function. Animal: nervous, epithetical, connective, & muscle. Plant: transport, protective, & ground. |
Organ | A structure made of a collection of tissues that carries out a specialized function. Animal ex: stomach, eye, kidney, lungs. Plant ex: stems, leaves, roots. |
Organ System | A group of organs working together to perform body functions. Examples: digestive system, respiratory system, circulatory system. |
Organism | A living thing that can carry out life processes by itself. |
Cytoskeleton | A web of proteins that give shape and support to the cell throughout the cytoplasm. |
Three things only in Plant cells | Cell wall, Chloroplast, large central vacuole |
ER | assists in the production, processing, & transport of the proteins and the production of lipids. |
Cell Wall | A rigid structure that surrounds the cell membrane that supports and protects plant cells. |
Mitochondria | Produces energy through chemical reactions-breaking down fats into carbohydrates-powerhouse of the cell. Recycles and decomposes proteins, fats, & carbohydrates. Double membrane, inner membrane folded, contains own DNA. |
Ribosomes | Thousands found in a single cell floating in the ER and throughout the cell. Make proteins. |
Lysosomes | Digestive "plant" for proteins, fats, & carbohydrates that transports undigested materials out of the cell for removal. Cell breaks down if lysosome explodes. |
Vacuole | Membrane bound sacs for storage, digestion, & waste removal that contains a water solution & helps plants maintain shape. |
Chloroplasts | Usually found in plant cells that contains green chlorophyll. This is where photosynthesis takes place. |
Nucleolus | Inside the nucleus that contains RNA to build proteins |
Golgi complex | A protein "packaging plant" that moves materials within and out of the cell. |