Identify the name(s), class and structure of the extra-cellular messenger molecule and briefly contextualize the intracellular metabolic biochemical pathways they affect (i.e. Protein, Carbohydrate, Lipid and Nucleotide). Briefly outline the effect(s) the extracellular messengers has (individually and in combination) on the organism locally (i.e. specific cells or tissue) and/or as a whole (i.e. the whole organism). Identify the precursors and the biochemical steps to produce the extra-cellular messengers (i.e. parent molecule, key enzymes & cofactors involved in synthesis) and describe the transport, half-life, receptor activation and fate following action (i.e. messenger degradation) within the cell/organism. Describe the biochemical pathway(s) (i.e. Protein, Carbohydrate, Lipid and/or Nucleotide), the selected extra-cellular messenger alters, including key enzymes/cofactors and intermediates, directly affected by the extracellular messenger selected.