BIOC32H3 Lecture Notes - Lecture 22: Melatonin, Lipophilicity, Tryptophan
Document Summary
No connection between individual component and only thing that units them is their common function, they all produce hormones that can regulate function of the body. Primary are organs that serve only an endocrine function. Secondary are organs that have endocrine function but also have other functions. For example heart does produce hormone, but that"s not sole purpose/function of heart. Anp hormone when secreted by heart facilitates urinary lose of sodium from bodily fluids. Heart is well able to determine blood volume of body. As sodium lost, blood volume reduces, atrial wall stretch reduces. Acting as monitor for total blood volume (heart). But many are not discrete such as ghrelin in the gut (hunger hormone, encourages you to eat)are diffused in the gut. Islets of langerhans are a bit discrete (collection of many cells together), produces insulin etc. Hormone are only considered to be hormones if met four criteria. 2) enter into the blood (sole route for transportation).
