As discussed in your text book, there are four categories of chemical signalling found in multicellular organisms; paracrine signalling, endocrine signalling, autocrine signalling and direct signalling across gap junctions. For this written assignment you will choose one of these signalling pathways to investigate in more detail.
For example if you chose the endocrine signalling pathway you could consider looking at a hormone such as insulin. You would describe the cells from which insulin is secreted and state the overall role of insulin in the body. In signalling pathways, each signal molecule has a receptor that it binds to, so you would indicate what the receptor for insulin is called and what immediate outcome the binding of insulin has to that receptor i.e. in the case of insulin, which regulates glucose uptake in the body, does the receptor directly interact with glucose or is it just part of a much larger signalling cascade.
To give you an indication of the complexity of cell signalling, visit the KEGG (Kyoto Encyclopaedia of Genes and Genomes) PATHWAY database. This database maps biological pathways and displays them as a collection of diagrams or graphs. If you wish to read more about it visit the overview page of the database.
Your written assignment should be submitted in a Word document (or similar program), double-spaced with 1-inch margins, and written in Times New Roman size 12 font. You should provide a word count at the end of your written assignment. Remember to include APA formatted citations for all of the information you have provided.
For help with APA citations
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