Which of the following is an example of autoregulation of...

Which of the following is an example of autoregulation of kidney function? a. The RAAS regulates Na $^{+}$ by secreting renin when blood pressure or blood volume decreases. b. The ADH system regulates water balance by decreasing water reabsorption and increasing excretion of salt. c. Receptors in the juxtaglomerular apparatus detect a higher salt concentration in the distal convoluted tubule and trigger constriction of the afferent arteriole to reduce glomerular filtration rate. d. ANF is released by the kidney to increase renin release. e. Angiotensin II lowers blood pressure by constricting arterioles

Which of the following is an example of autoregulation of kidney function?
a. The RAAS regulates Na $^{+}$ by secreting renin when blood pressure or blood volume decreases.
b. The ADH system regulates water balance by decreasing water reabsorption and increasing excretion of salt.
c. Receptors in the juxtaglomerular apparatus detect a higher salt concentration in the distal convoluted tubule and trigger constriction of the afferent arteriole to reduce glomerular filtration rate.
d. ANF is released by the kidney to increase renin release.
e. Angiotensin II lowers blood pressure by constricting arterioles

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Key Concepts

Juxtaglomerular Apparatus

The juxtaglomerular apparatus is a complex structure located near the glomerulus that plays an essential role in monitoring and regulating kidney function. It contains sensor cells that detect sodium chloride levels in the filtrate and helps modulate vascular tone and GFR through mechanisms such as tubuloglomerular feedback.

Tubuloglomerular Feedback

Tubuloglomerular feedback is a key mechanism of renal autoregulation where specialized cells in the juxtaglomerular apparatus detect changes in the sodium chloride concentration in the distal tubule. Based on these changes, the afferent arteriole adjusts its diameter to either increase or decrease GFR, thereby stabilizing the kidney's filtration process.

Renal Autoregulation

Renal autoregulation is the intrinsic ability of the kidneys to maintain a relatively constant blood flow and glomerular filtration rate (GFR) despite fluctuations in systemic blood pressure. It ensures that kidney function remains stable by using local mechanisms to adjust vascular resistance in response to changes in blood pressure.

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