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Physiological concept of positive and negative feedback

Video transcript
in this video were going to explore positive and negative feedback in terms of physiology so many molecular physiological customs seized control my feedback mechanisms there are two types of feedback please we're going to talk about the first is positive feedback its when the rate of process works to increase of product we can think of this as a DOM ago or so the process will work to increase one product which will then go ahead and stimulate the production of another product and so opposite is negative feedback or when the rate of process has to be controlled prevent accumulation product negative feedback works to decrease the product so that's important because if we have an accumulation of a product in our blood for example we can't have it build up to excessive levels that could be really toxic that's why I get feedback mechanisms are put into place to control the process that increasing the product so it will work to inhibit that process by decreasing the product let's lock at a physiological process that uses positive and negative feedback and more specifically occurs in females so the first track shirt and blue is called the hypothalamus the hypothalamus as you may have heard in your studies is the master control where r endocrine system now it signals or basically talks to this next land here the pituitary gland pituitary gland is further broken down into two loads the back lobe is the posterior and organized focus on is the end here pituitary now down we have another organ called the ovary so females have two ovaries that are located waive further down in the body well and the pituitary gland are up in the brain now also color-coded these hormones that we're going to talk about so that way we can keep them straight as we go through the process the first estrogen the second is GNR age or releasing third as age or luteinizing hormone in the last progesterone Jordan menstrual cycle and more specifically before ovulation small amounts of estrogen are secreted from this small amount of estrogen is just enough to trigger the release of two other phones so it stimulates the release of GNR age from the hypothalamus and also works to stimulate the release of age from the answer to Terry so this is an example of positive feedback because the process that stimulated estrogen also stimulated the release of GnRH college so she had our age can also on the answer harry just didn't like the production and release of even more outraged the blood so here's positive feedback again communicate its message gently and you're very now can also go ahead and stimulate the release even more us again feedback so here we have a psycho causes the release of Dr age which causes the release of age which causes the release of even more estrogen and the cycle continues so you can see that she knows so actually produced let's find out of here which triggers GNR age and that works to trigger an early age are going to be accumulating in our blood do positive feedback so when high amounts of a legion of blood another hormone well wait so it's a harmonious called progesterone the progesterone is triggered when it senses that he's a legit lows are too high and it's a credit from the corpus luteum after I finish the progesterone will trigger the GnRH production in the hypothalamus to turn off and then that will also trigger allergic reaction in the answer to carry to also so can you guess what this is all that negative then you are correct since the levels are becoming too high the blood needs to cause and inhibition those products that way they don't accumulate in the blood that's why progesterone comes in terms of positive feedback process and decreases the products that's where we have an example of negative feedback in this mechanism got back we can see an early age cause the production or progesterone secretion in the first place and is going to go back and work uninhibited furthers our age and mileage as you can see you soon that's how we maintain homeostasis or balance her body which is really important for me molecular and physiological processes that way nothing in our body becomes too out of balance too high or too low that's the beauty of physiological feedback