PHGY 210 Lecture 2: Lecture 2 Final Alborz edited
4 Feb 2019
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Feedback control of hormone secretion: hormone secretion is precisely regulated by feedback mechanisms in order to maintain homeostasis, an excess of hormone, or an excess of hormonal activity lead to a diminution of hormone secretion. So the log will flip into a direction: negative feedback loops are used to maintain homeostasis, in the log balance analogy, pressure is added on either side to maintain balance. It therefore is a self-correcting mechanism (if one side has too much pressure, pressure will be added on to the other side to even out the effect): calcium homeostasis is an example of a negative feedback inhibition. More details we be seen in the next lectures. Pituitary gland: the pituitary gland is an extension of the hypothalamus. It is made up of 2 types of tissues: the anterior pituitary, which is also known as the adenohypophysis (non-neuronal) and the posterior pituitary, also known as neurohypophysis (neuronal)
