What do negative feedback mechanisms do

What is a negative feedback mechanism?

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Negative feedback mechanisms are self-regulating responses to changes experienced by a system or organism, usually due to external influences. These mechanisms feed some of the output of these changes back into the system to trigger counter…

What is the main difference between the negative feedback and pos…?

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Negative feedback (which is more common) is when you have a reaction and it produces products. As the concentration of the products increase, it signals something to stop making the product. An example of this would be controlling glucose l…

Why does the nervous system use negative feedback mechanisms???

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The Nervous System. The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nerv…

Related Questions Answered on Y!Answers

Explain the difference between positive and negative feedback mechanisms which control homeostasis?

Q:

A: A Negative feedback mechanism BLOCKS (inhibits) the pathway involved.A Positive feedback mechanism PROMOTES (activates or reinforces) the pathway.

Why wouldn’t natural negative feedback mechanisms work to cancel the increases of CO2 in the amtosphere?

Q: A number of simple photosynthetic organisms need little else to survive but CO2, Water, and Sunlight. Many of these thrive in oceanic environments. Why wouldn’t the rise in CO2 simply result in a general increase in their population and a general reduction in atmospheric CO2?Atmospheric nitrogen may be 70%, but that doesn’t guarantee that it can be used by the organisms I discussed. It COULD be the limiting factor. However, I know there are microbial organisms that convert atmospheric nitrogen into other usable forms. Couldn’t these work in conjunction with the other types?

A: There is clearly a natural cylce in atmospheric CO2, and plants probably play a role in this. Thus, increasing the plant biomass could be considered a part of the solution to increased CO2 levels in the atmosphere.The problem is, the current levels of atmospheric CO2 are significantly higher than preindustial maximums (roughly 30% higher in fact) and this may overwhelm the natural controls.Of course, current temperatures are still well below preindustrial maximums so there is some question as to what the real effect of the high CO2 levels is.

What are some examples of positive and negative feedback mechanisms in climate change?

Q:

A: Positive – Reflective ice melts, exposes dark ground, things get warmer faster.Ocean waters warm, release more CO2, things get warmer faster.The only negative feedback I’ve heard about is more high altitude clouds form, block the Sun, things get cooler. But clouds are complicated. Low altitude clouds make things warmer.Most scientists think positive feedbacks will dominate, and global warming will get worse faster than the very conservative IPCC report says. Richard Lindzen is the rare exception, and even he admits that his views are an unproven theory which he’s working on.deathkomes4ya – James Lovelock is a well respected scientist who has published extensively on the self regulating nature of the Earth. The data on global warming has convinced him that this time is different. See:http://www.ecolo.org/lovelock/lovebioen.htm