BIOSC 150 1nd Edition Lecture 15 Outline of Last Lecture I Tissues II Organs III Muscle IV Transmembrane functions Outline of Current Lecture 1 Review for upcoming exam Current Lecture Rough Endoplasmic Reticulum contains ribosomes important for protein glycosolation and synthesis Smooth Endoplasmic Reticulum does not contain ribosomes important for synthesis of phospholipids and steroids stores calcium Golgi Apparatus where proteins go after the rough er further glycosolates proteins differential glycosolation occurs here Lysosomes recycling center for proteins that are unproperly folded at the RER Nucleus will show up a dark circle on transmission electron micrograph contains DNA largest organelle in the cell Mitochondria highly folded circular or oval structure Cytoplasm helps move organelle other objects around the cell Lumen hollow tube inside cell Protein Synthesis Protein begins in the nucleus exits the nucleus through nuclear pores is carried to the ribosomes on the rough er where protein folding and glycosolation occurs is then taken to the golgi apparatus where further differential glycosolation occurs is then taken to one of three These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute places the extracellular membrane to be secreted outside the cell the lysosome to be recycled or the plasma membrane NRS stands for nuclear recognition signal a tag that allows proteins to enter the nucleus made of an amino acid strand Plasma Membrane selectively permeable barrier that allows small ions to pass through Intermediate Filaments proteins that help for cell structure and support made of actin Microtubules proteins that aid in cell movement and structure of the cell Tight Junction can be observed between two separate cells helps to hold cells together and does not allow dye or other filaments to pass through Gap Junctions small holes in the spaces between cells that allows for the passage of small ions and such Apical Surface the top part of an epithelial tissue Tissue a unit of cells brought together Organ a unit of tissues brought together Signal recognition Proteins are required at different places locations in the cell There needs to be a certain tag to identify proteins and therefore send them to the different locations NRS is am amino acid sequence located on proteins that allows for the passage of the proteins into the nucleus Other proteins contain specific sugar tags that allows for their passage to other organelles Specific proteins are required for specific functions at specific location in the cell
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