The vertebrate kidney helps to keep the acidity of the body fluids constant by varying the amount of hydrogen ions (H⁺)it secretes into the urine.You can confidently predict that this aspect of kidney function will be controlled by ______. A) a negative feedback mechanism B) nerve impulses from the brain C) a hormone produced in the brain D) a hormone produced in the kidney itself

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Quizplus · Accepted Answer

The maintenance of constant acidity levels in body fluids is a vital aspect of homeostasis, which is achieved through a negative feedback mechanism. In this case, the kidney senses changes in the acidity levels of body fluids and responds by secreting varying amounts of hydrogen ions into the urine to bring the levels back to the set point. Once the levels are restored, the feedback loop is turned off, and the process is repeated when necessary. This is an example of a negative feedback mechanism, which is a vital control mechanism for maintaining homeostasis in the body. Nerve impulses or hormones may also play a role in moderating kidney function, but the primary control mechanism for this aspect of kidney function is negative feedback.

The Vertebrate Kidney Helps to Keep the Acidity of the Body