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The function of this cluster of arteries located near the carotid artery that sense blood oxygen levels and send corresponding signal to the brain are an example of negative feedback helping to maintain homeostasis.
Homeostasis is the ability to maintain balance among all of the characteristics necessary for survival. This consist of numerous mechanisms to adapt and correct any variation in the level of homeostasis. Some examples are :
- Temperature control
- Liquid concentrations
- Sleep cycle regulations
- and many more.
Positive feedback is the correction caused by an excess of a substance, Negative feedback however, is when a signal is sent to correct the <u>lack</u> of something. In the example given, signals are sent to the brain in response to low levels of oxygen in the blood, in order to increase and correct this variation in the homeostasis of blood oxygen levels. For this reason, the final option is correct.
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