NURS 534 Advanced Physiology Questions With Complete Solutions

Most processing of ribonucleic acid (RNA) occurs in the ______ Nucleus = contains DNA and RNA, replicates, repairs, and transcribes genetic material - Nucleus The RNA-protein complex exist in in the cytosol in either free form or attached to the _______ - Edoplasmic reticulum (ER) The _______ is a network of channels that extend through the cytoplasm. - Endoplasmic reticulum (ER) A _____ Endoplasmic reticulum (ER) is prominent in cells that produce/secrete high qualities of proteins. - Rough important in excreting molecules (toxins); also the smooth ER is the site for synthesizing lipids and fats - The smooth ER • Ribosomes are also located throughout the cytoplasm (i.e., they do not have to be connected with the ER). • The purpose of these structures is to translate messenger ribonucleic acid (mRNA) for proteins needed in the cytosol. For proteins that will be secreted from the cell or incorporated into the cell's membrane, then the manufacturing takes place in the ribosomes attached to the ER. Which ribosomes is this one? Free ribosomes in the cytoplasm AND Ribosomes embedded in the rough endop - Free ribosomes * A network of membranes and vesicles. * The Golgi apparatus packages proteins into vesicles * The vesicles break off from the Golgi complex and migrate to a variety of intracellular and extracellular destinations.