Q. Renal autoregulation of GFR helps prevent large fluctuations in GFR despite wide variations in arterial blood pressure. With regard to autoregulation, which is TRUE? (Solved)
1. the macula densa cells sense change in afferent arteriolar pressure
2. falling GFR results in a feedback to decrease efferent arteriolar pressure
3. falling GFR results in an increase in renin secretion from macula densa cells
4. decreased macula densa concentration of NaCl results in dilatation of afferent arterioles
5. decreased GFR decreases NaCl reabsorption in the ascending loop of Henle
- d. decreased macula densa concentration of NaCl results in dilatation of afferent arterioles