How does the negative feedback mechanism work?

Answer 1

The negative feedback mechanism is important in many biological processes. The process can be shut off by the accumulation of products further along in the process.

Answer 2

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-responses which result in restoring the system to its previous undisturbed state, or mitigating the effects of the initial change. It is this characteristic of "negating" the impact of changes which defines such operations as "negative feedback mechanisms". Examples include automated pressure valves (to regulate pressure), human sweat glands and pores (to stabilize body temperature) and rocking chairs.

Answer 3

A good example of a negative feedback control mechanism is the thermostat found in most electronic ovens. The oven system consists of two main parts, the heating element(which heats the oven) and a thermostat(which detects temperature within the oven). The system operated thus:

1.A certain temperature is selected on the oven.

2.If the thermostat reads a lower temperature than selected inside the oventhe heating element is switched on and the oven begins to heat up

3.Once the Temperature is equal to or greater than the desired temperature selected, the themostat will switch the heating element off and the oven will begin to cool down.

4.The oven will continue to cool down until the thermostat detects a temperature lower than that desire and turns the element back on again.

This is type of feedback is used to achieve a certain level of a specific variable and comes in many different forms, a few other examples are central heating systems, automatic Louvre controls etc. The advantage of this type of control is that it is simple to employ in a variety of situations and the components are fairly cheap and simple. One drawback of this form of control is that it causes lag which results (taking the oven as an example) in the delay between the heating element switching off and the oven cooling and between the oven cooling and the thermostat detecting a low temperature.

When you get too hot you start to sweat to cool off, that is a negative feedback mechanism.

Answer 4

When the positive differential input terminal of an OP AMP is linked to the output, we have positive feedback and when the negative differential input terminal is linked to the output , we have negative feedback.

Answer 5

The body has several negative feed back mechanisms. In negative feedback loops our body will seek to reverse th direction of a stimulus. Meaning our body dislikes the stimulus, it will attempt to reverse it. Some examples: blood pressure, temerature control, blood glucose levels.

Answer 6

A kind of close loop feedback system that always substracts the measured output value from the setpoint/required value.

Answer 7

To regulate the sugar level in the blood. Mostly.

Answer 8

It maintains homeostasis