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Bio Unit 3
vocab for test
| Term | Definition |
|---|---|
| Cell | basic unit of all forms of life |
| Cell Membrane | thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell |
| Cell Theory | fundamental concept of biology that states that all living things are the basic unit of structure and function in living things; states that new cells are produced from existing cells |
| Cell Wall | strong, supporting layer around the cell membrane in some cells |
| Centriole | structure in an animal cell that helps to organize cell division |
| Chloroplast | organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy |
| Cytoplasm | in eukaryotic cells, all cellular contents outside the nucleus; in prokaryotic cells, all of the cells contents |
| Cytoskeleton | network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement |
| Endoplasmic Reticulum (Smooth/Rough) | internal membrane system found in eukaryotic cells; place where lipid components of the cell or cell membrane are assembled; rough er is covered in ribosomes while smooth er is not |
| Eukaryote | organism whose cells contain a nucleus; more complex |
| Lipid Bilayer | flexible double layered sheet that makes up the cell membrane and forms a barrier between the cell membrane and forms a barrier between the cell and its surroundings |
| Lysosome | cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell |
| Prokaryote | unicellular organism that lacks a nucleus; simple cell |
| Ribosomes | cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell the site of protein synthesis |
| Selectively Permeable | property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane |
| Organelle | specialized structure that performs important cellular functions within a cell |
| Mitochondrion | cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use; powerhouse of the cell; converts energy stored in glucose in to ATP for the cell |
| Golgi Apparatus/Body | organelle in cells that modifies, sports, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell |
| Vacuole | cell organelle that stores materials such as water, salts, proteins, and carbohydrates |
| Nucleus | structure that contained the cell genetics material in the form of DNA |
| Nucleolus | the very center of the nucleus |
Created by:
lesley_j
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