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Nucleus - Correct Answers Contains the genetic information of the cell Nuleolus - Correct Answers Produces RNA which transcribes, processes, which sends out information to the ribosomes. Smoothe Endoplasmic Reticulum - Correct Answers Production of phospholipids Rough Endoplasmic Reticulum - Correct Answers Site of synthesis of lysosomes and proteins for intracellular and extracellular use. Ribosomes - Correct Answers Aids in protein production on the rough endoplasmic reticulum as well as polysomes (messenger RNA and ribosomes). The ribosomes along with transfer RNA interpret messenger RNA which carries the genetic material of the cell. Golgi apparatus - Correct Answers Sorts, chemically modifies, and packages proteins produced on the rough endoplasmic reticulum. Lysosomes - Correct Answers Combines with food vacuoles and digests materials engulfed by cells. Lysosome membrane separates digestive enzymes from the cytoplasm. Peroxisomes - Correct Answers Breaks down various potentially toxic intracellular molecules and is involved in nerve cell myelin sheath development. Mitochondria - Correct Answers Contains enzymes to convert food into energy. ATP production occurs in the mitochondria. Cilia - Correct Answers Propels materials along the surface of certain cells. Centrioles - Correct Answers Helps organize spindle apparatus necessary for cell division. secretory vesicles - Correct Answers Stores protein hormones or enzymes in the cytoplasm awaiting the signal for release to the outside of the cell. food vacuole - Correct Answers Stores ingested material and combines with lysosomes. It is the site of digestion and degradation of engulfed materials. (for example autophagy) Describe the characteristics of the different types of epithelial cells. - Correct Answers Epithelial cells line the outside and all interior areas of the body. The structure depends on the location and function of the cell. Simple epithelium - a single layer of cells Stratified epithelium - multiple layers of cells Different epithelial cell shapes include squamous, cuboidal, and columnar. What are the functions of epithelial cells? - Correct Answers Epithelial cells provide protection as well as play a role in absorption, secretion, and excretion. An example of the protective function is that of the stratified squamous epithelium of the skin, mouth, esophagus, and vagina. Keratin is on the outer side of the skin. These are made of a fibrous protein that is shed and replenished. List the 3 types of connective tissue and discuss their characteristics. - Correct Answers Connective tissue is made up of a large extra-cellular matrix and fibroblast cells that produce several types of fibers.