Cell Structure
This is an outline of material presented in the lecture on cell structure. Be sure to read Chapter 2 of our text and to compare the terms in this outline to the drawing presented in class or provided by the text.
| Cytoplasm: | area of the cell outside of the nuclear membrane |
| Nucleoplasm: | area of the cell within the nucleus |
| Chromatin: | dispersed genetic material within the interphase nucleus |
| Nucleolus: | a condensed area(s) of material within the interphase nucleus; believed responsible for formation of t-RNA |
| Nuclear Membrane: | a double membrane surrounding the nucleoplasm and possessing nuclear pores |
| Centrioles: | organelles from which the spindle apparatus arises; a single structure until division begins |
| Endoplasmic Reticulum: | network of cytoplasmic tubules believed to be major site of protein formation and packaging as well as facilitator of chemical communication between the interior and exterior of the cell |
| Rough Endoplasmic Reticulum (RER): | portion of the endoplasmic reticulum believed responsible for protein synthesis |
| Smooth Endoplasmic Reticulum (SER): | portion of the endoplasmic reticulum believed responsible for packaging protein or at least moving it from rough endoplasmic reticulum toward the Golgi Apparatus |
| Golgi Apparatus: | area of lysosome formation and protein accumulation (packaging) |
| Vacuole: | single-membrane bound area containing fluid, food, debris or a combination of these |
| Mitochondrion: | double-membrane bound organelle responsible for cellular respiration (the Krebs or TCA cycle occurs here) |