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Water Balance and Control of Blood Pressure Discussion Question 1

Water Balance  and Control of Blood Pressure Discussion Question 1

Q 1. When the macula densa cells detect low Na + levels , is GFR high or low? What is the physiological response ? 2.When the macula densa cells detects high Na + levels , is GFR high or low ? What is the physiological response?

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1. When the macula densa cells detects low levels of sodium the GFR will be low. The physiological response related to the low GFR is that when the macula densa cells detects low sodium levels , the juxtaglomerular cells will secretes renin directly into the blood stream . Renin is a hormone that is secreted into the bloodstream that raises the blood volume and blood pressure.