Biological Response

FIGURE 1-1 Overview of traditional endocrine system. The endocrine hormone producing cell is stimulated to biosynthesize the hormone (■) as a consequence of the balance of incoming physiological signals represented by (i) the stimulus for cellular secretion (•) and (ii) the negative feedback loop. The secreted hormone (■) travels through the circulatory system to distal target cells. Thus, the hormone (■) interacts with a specific receptor to initiate the generation of a specific biological response(s). As a consequence of the pressure of the biological response(s), a chemical signal is sent back to the endocrine hormone producing cell via the "negative feedback loop" to indicate the presence of the hormone.

TABLE 1-1 Categorization of Representative Human Hormones"
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