Our focus here is on the clinical implications of these elements. Your task in this assignment is to summarize the potential clinical implications of each of the following: a) The blood-brain barrier b) Brain-derived Neurotrophic Factor c) The Hypothalamic-pituitary-adrenal axis ALSO, please write a brief definition for each of the following neurotransmitters AND what the clinical implications are of each: d) Acetylcholine e) Dopamine f) Norepinephrine g) Serotonin h) Glutamate i) Gamma-aminobutyric acid.