Hormones:the first step

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Negative feedback is the regulating system that stablizes the results.

Regulating the secretion of hormones/Negative feedback
Suppose a 'result' occurs because of a 'cause'. When the 'cause' is effected in some way in order to regulate the 'result', this regulating system is called feedback. The feedback system that stablizes the 'resut' is especially called negative feedback.

How a car works (upper left) Speed control on the highway Part 1(Upper right)
Engine RPM is the "cause", and you get speed as the "result". If there is too much speed, the 'result', is there, you can decrease the engine RPM, the 'cause', by letting go the accelerator.(You see only little exhaust gas, right?)
Speed control on the highway Part 2(Lower left) Figure(Lower right)
If there is too little speed, the 'result', is there, you can increase the engine RPM, the 'cause' by stepping on the accelerator(You see a lot of exhaust gas, right?) Negative feedback system stablizes the amount of 'result' by increasing the 'cause' when there are too little 'result', and decreasing the 'cause' when there are too much 'result.The hormonal effect is being monitored and via the negative feedback system, regulates hormonal concentration.
Achievement Quiz
1. On the highway, to drive the car at the same speed, when the speed increases on the descending slope, you would try to [ a. increase / b. decrease ] the engine RPM.

2. On the highway, to drive the car at the same speed, when the speed decreases on the ascending slope, you would try to [ a. increase / b. decrease ] the engine RPM.

3. In negative feedback system, when there are too little 'result', the 'cause' that brings the 'result' is [ a. increased / b. decreased ] .

4. In negative feedback system, when there are too much 'result', the 'cause' that brings the 'result' is [ a. increased / b. decreased ] .
Answer
1. The correct answer is b. People who don't drive, think about bicycles. You don't pedal on a downhill road, do you?

2. The correct answer is a. With negative feedback, when the 'result' is not enough, the 'cause' increases.

3. The correct answer is a. When the 'result' is not enough, the 'cause' increases.

4. The correct answer is b. This feedback is called positive feedback.With negative feedback, when there are too much 'result', the 'cause' decreases.
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