(80% adrenaline, 20% noradrenaline), composed of chromaffin cells
Zona fasciculata, which secretes mainly cortisol.Zona glomerulosa, which secretes mainly aldosterone.They are divided into four functionally and anatomically distinct regions:.Adrenal glands are small (5-6g) well-perfused glands that lay on the anterior superior border of each kidney.Plus it was probably worthwhile to bring all the material together in one spot. how they synthesise, store and secrete their hormones) and most of the regulatory influences on their function are not really discussed anywhere else.
What's left for this page, then? The remaining aspects left uncovered are the functional anatomy of the adrenal glands, their physiological behaviour (i.e. The chapter on the humoral regulation of blood volume and flow covers much of the content concerning the regulation and end-organ effects of adrenal hormones like aldosterone and the catecholamines. Catecholamine receptors and their many clinical effects are discussed in the pages dealing with the autonomic nervous system, and the steroids and catecholamines themselves are important enough to have whole monographs dedicated to them alone. For example, the chapter on the endocrine functions of the kidney coveres all things related to the functions of renal hormones, as that is a whole separate syllabus item (Section H1(iv), "outline the endocrine functions of the kidney"). Without trying to be lazy, and only out of mild interest in the SEO-destroying effects of duplicate content, the author needs to point out that much of this material has had to be scattered across Deranged Physiology because it would have been more logical to have it positioned there. This chapter is related to Section U1(vi) from the 2017 CICM Primary Syllabus, which asks the exam candidate to "describe the control, secretions and functions of renal and adrenal hormones".
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