Terms : Hide Images
| 498403989 | Light Microscope (LM) | A microscope where visible light is passed through the specimen and then through glass lenses. | |
| 498403990 | Electron Microscope (EM) | A microscope where a beam of electrons is focused through the specimen or onto it's surface. | |
| 498403991 | Cell Ultrastructure | The cellular anatomy revealed by an electron microscope. | |
| 498403992 | Scanning Electron Microscope (SEM) | A microscope where an electron beam scans the surface of the sample (which is coated by a thin film of gold) and creates a 3D topographic image for fine detail. | |
| 498403993 | Transmission Electron Microscope (TEM) | A microscope where an electron beam is used to study the internal ultrastructure of cells to be displayed on digital screens or photographs. | |
| 498403994 | Cytology | The study of cell structures. | |
| 498403995 | Biochemistry | The study of molecules and chemical processes (metabolism) of cells. | |
| 498403996 | Cell Fractionation | The process of taking cells apart and separating their major organelles and other sub-cellular structures from one another; used to isolate (fractionate) cell components based on size and density. | |
| 498403997 | Centrifuge | Instrument used to spin test tubes holding mixtures of disrupted cells at various speeds. | |
| 498403998 | Cell ________ | Fractionation; Cells are homogenized in a blender,then centrifuged at different speeds and durations to fractionate different cell components (large vs. small components). | |
| 498403999 | True | True or false: the -four- basic features of every cell are the plasma membrane, the cytosol, chromosomes, and ribosomes. | |
| 498404000 | Cytosol | A semifluid, jellylike substance within a cell, enclosed by a membrane that carries organelles. | |
| 498404001 | Ribosomes | Tiny complexes which make proteins according to instructions from genes. | |
| 498404002 | False; DNA. | True or False: The major difference between prokaryotic and eukaryotic cells is the location of their -nucleus.- | |
| 498404003 | Eukaryotic Cells | A cell in which the DNA is located in the nucleus. | |
| 498404004 | Prokaryotic Cell | A cell in which the DNA is concentrated in the nucleoid. | |
| 498404005 | Nucleoid | A dense region of DNA in a prokaryotic cell, not enclosed by a membrane. | |
| 498404006 | Cytoplasm | The interior of a prokaryotic cell; the region between the nucleus and the plasma membrane of a eukaryotic cell. | |
| 498404007 | Yes! | Yes or No: Eukaryotic cells are generally much larger than prokaryotic cells; size is a general aspect of cell structure that relates to function. | |
| 498404008 | Plasma Membrane | A selective barrier that allows sufficient passage of oxygen, nutrients, and wastes to service the entire cell. | |
| 498404009 | Volume | For each square micrometer of membrane, only a limited amount of a particular substance can cross per second; therefore, the ration of surface area to _____ is critical. | |
| 498404010 | Greater; Larger | A smaller object has a _____ ratio of surface area to volume; however, as the cell increases in size, it's volume grows proportionally ______ than it's surface area. | |
| 498404011 | More Often | Flatter, elongated, narrower cells are _________ found in areas where exchanging of materials in the surrounding occurs, such as in intestinal cells. | |
| 498404012 | Compartments | Incompatible processes can go on simultaneously inside a single cell because of all of a eukaryotic cell's different _______, surrounded by individual membranes. | |
| 498404013 | Nucleus | The organelle within the cell containing DNA and RNA, that is responsible for growth, reproduction, and protein synthesis (indirectly). | |
| 498404014 | Nuclear Envelope | Double membrane that encloses the nucleus, keeping it separate from the cytoplasm. | |
| 498404015 | Nuclear Lamina | A net-like array of protein filaments that lines and supports the nuclear side of the nuclear envelope so that it may maintain the shape of the nucleus. | |
| 498404016 | Chromosomes | Threadlike structures made of DNA molecules that contain genes. | |
| 498404017 | Chromatin | A complex of proteins, DNA, and RNA; later forms into sister pairs of chromosomes. |
