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Once adequate circulating GH levels are reached, the hypothalamus turns off GHRH stimulation and releases inhibitory somatostatin to temporarily halt GH secretion in a process known as negative feedback. In addition to GHRH and somatostatin, the GH axis is also regulated by the interplay of other factors, such as the hormones ghrelin (a GH-stimulatory peptide secreted from the stomach) and IGF-1 (an insulin-like hormone produced by the liver in response to GH), as shown below: Figure 1: GH Feedback Regulation (10) All of these elements are integrated into a synchronized feedback loop consisting of alternating GH stimulation and inhibition which results in the sporadic or pulsatile secretion of GH
Learning one drug at a time to strengthen my pharmacology knowledge
Mech Ageing Dev 1987
Its also common for people who have pernicious anemia (a type of anemia that is characterized by a lack of intrinsic factor) also tend to develop a deficiency
2017-010-20) and the study was conducted according to the principles expressed in the Declaration of Helsinki
