Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
7.1 / 7.2 219pg
pg219
| Term | Definition |
|---|---|
| cell | basic unit of all forms of life |
| cell theory | fundamental concept of biology that states that all living things are composed of cells; that cells are the basic units of structure and function in living things; and that new cells are produced from existing cells |
| cell membrane | thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell |
| nucleus | the center of an atom, which contains the protons and neutrons: in cells, structure that contains the cell's genetic material in the form of DNA |
| eukaryote | organism whose cells contain a nucleus |
| prokaryote | unicellular organism that lacks a nucleus |
| cytoplasm | in eukaryotic cells, all cellular contents outside the nucleus: in prokaryotic cells, all of the cells' contents |
| organelle | specialized structure that performs important cellular functions with in a cell |
| vacuole | cell organelle that stores materials such as water, salts, proteins, and carbohydrates |
| lysosome | cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell |
| cytoskeleton | network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and its involved in movement |
| centriole | structure in an animal cell that helps to organize cell division |
| ribosome | cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis |
| endoplasmic reticulum | internal membranes system found in eukaryotic cells; place where lipid components of the cell membranes are assembled |
| Golgi apparatus | organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell |
| chloroplast | organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy |
| mitochondrion | cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use |
| cell wall | strong, supporting layer around the cell membrane in some cells |
| lipid bilayer | flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and it's surroundings |
| selectively permeable | property of biological membranes that allows some substances to pass across it while others cannot: also called semipermeable membrane |
| diffusion | process by which particles tend to move from a more concentrated area to an less concentrated area |
| facilitated diffusion | process of diffusion in which molecules pass through the membrane there cell membranes |
| aquaporin | water channel protein in cell |
| osmosis | diffusion of water through a selectively permeable membrane |
| isotonic | when the concentration of two solutions is the same |
| hypertonic | when comparing the solution with lesser concentration of the solutes |
| hypotonic | when comparing the solution with greater concentration of the solutes |
| osmotic pressure | pressure that must be applied to prevent osmotic movement across a selectively permeable membrane |
| homeostasis | relatively constant internal physical and chemical conditions |
| tissue | group of similar cells that perform a particular task |
| organ | group of tissues that work together to perform closely related functions |
| organ system | group of organs that work together to perform a specific function |
| receptor | on or in a cell, a specific protein to whose shape fits that of a specific molecular messenger, such as a hormone |
Created by:
user-1962469
Popular Life Science sets