1. Find a protein that is released from the cell and describe its role in the body. What is the function of the protein? How is it related to exocytosis? Is the protein constitutively produced and released, or is it released as a result of an extrinsic signal? Write a ½ page essay to answer the basic questions outlined above. Give details that will help you understand the concept of exocytosis and how it relates to the release of this protein. Provide a reference. (10pts)
2. Choose an extracellular biomolecule, agent, or nutrient that is endocytosed into the cell. Describe the "material" in detail. What is it? How is the cell exposed to it? What does it do? Describe how the extracellular biomolecule or any other agent is internalized into the cell. What effects does this molecule or agent have on the cell? Write a ½ page essay to answer the basic questions outlined above. Give details that will help you understand the concept of endocytosis and how it relates to the ingestion of this "material". Provide a reference. (10pts)