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What are some examples of a positive feedback loop and a negative feedback loop?
Wiki User
∙ 9y ago
The most common by far is negative feedback, pretty much every hormone works through negative feedback.
Take for example tiroxine: low levels of tiroxine induce production of TRH and TSH which in time increase production of tiroxine, and when the levels of tiroxine are high, it lowers the production of TRH and TSH, lowering production of tiroxine as well. Another example would be insulin: when blood sugar levels rise, the pancreas produces more insulin, and once it takes effect and blood sugar levels lower, the pancras stops the increased production.
Positive feedback on the other hand is more rare, an example would be childbirthing, when the baby stretches the cervix, it induces production of oxytocin in the pituitary gland, which causes the contractions of the uterus, pushing the baby out and stretching the cervix even more, making the pituitary gland produce even more oxytocin
Wiki User
∙ 12y ago
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How is a positive feedback stopped?
The positive feedback loop is terminated by the end of childbirth...
What is the difference between feedback negative feedback a negative feedback response a negative feedback mechanism and a negative feed back loop?
in negative feedback. when an enzyme (negative feed back mechanism) produces too much of a molecule or substance that substance binds to the enzymes allosteric site to hault production of that substance (negative feedback response). and the whole process is the negative feedback loop.
What is a physiological feedback loop?
There are two kinds: one that turns off a reaction and one that adds to it. Negative feedback will stop a reaction when it is complete and will not allow it to continue to run. Most of our body systems work in this manner. It is some like filling a washing machine. It will turn off when full and begin to wash. The opposite is positive feedback, that washer will over flow. One of the best examples of positive feedback is the clotting mechanism.
Ozone layer depletion is an example of what kind of feedback loop?
positive feedback loop because cause increases the effect. thank you very much!
What are the 4 conditions of homeostasis?
Four things that need to be maintained for homeostasis in the body is internal regulation, the ability to regulate pH. levels, regulation of blood pressure and regulation of glucose levels. Homeostasis overall is the balance of things that makes an organism well.
Positive feedback loops are usually part of a larger?
negative feedback loop
What are four conditions in the cell that must be kept in the homeostatic balance?
- temperature - negative feedback loop - positive feedback loop - water balance
What makes closed-loop op amp unstable?
A: It does not. The loop becomes unstable ONLY if there is positive feedback either voltage or phase. For a close loop to be stable negative feedback is required.
Is the ADH feedback loop an example of positive or negative feedback?
The ADH feedback loop is an example of a negative feedback loop. Negative feedback loops occur when the output of a system acts to oppose the changes to the input of the system. This is the case with ADH because when there is not enough water, the hypothalamus and pituitary gland work to release ADH so that the body can retain more water.
What is negative feedback of a closed loop system?
Negative feedback is a feedback where it is used in negative side in a closed loop system.Such as a inverting side feedback in op-amp.
Is the ADH feedback loop an example of positive or negative feedback explain?
The ADH feedback loop is an example of a negative feedback loop. Negative feedback loops occur when the output of a system acts to oppose the changes to the input of the system. This is the case with ADH because when there is not enough water, the hypothalamus and pituitary gland work to release ADH so that the body can retain more water.
How is a positive feedback stopped?
The positive feedback loop is terminated by the end of childbirth...
Does deforestation create a positive or negative feedback loop effect?
negative. I'm not sure what a feedback loop effect is but i know that the more you chop, the more air we lose, the more animals lose their homes, the less air our cows have to make my burgers!
What is the difference between feedback negative feedback a negative feedback response a negative feedback mechanism and a negative feed back loop?
in negative feedback. when an enzyme (negative feed back mechanism) produces too much of a molecule or substance that substance binds to the enzymes allosteric site to hault production of that substance (negative feedback response). and the whole process is the negative feedback loop.
What is a good example of a negative feedback loop?
dik Not sure what they mean by that but... A good example of a positive feedback loop is the increased production of insulin by our pancreas. After a meal we may have heightened blood sugar levels. The endocrine system triggers insulin production in the pancreas to counteract this rise and return our blood sugar levels back to normal. Once normality has been reached the endocrine system signals our pancreas to cease the production and release of insulin. Actually, that is an example of a negative feedback loop. Negative feedback loops negate an action, while positive feedback loops encourage it. An example of a Positive feedback loop is childbirth, the body increases the amount of oxytocin in the blood to encourage contractions in order to birth the baby.
What is a vicious cycle?
positive feedback loop
What happens during positive feedback loop?
During positive feedback loop, e.g. a gland activates a hormone and the hormone in turn activates the gland. After the hormone knows that it is being activated by the gland, the hormone signals the gland to produce more of the hormone. This is positive feedback loop.
