The juxtaglomerular cells together with the macula densa are called the juxtaglomerular apparatus, which is important in regulating the secretion of
Which of the following is an abnormal constituent of urine?
Which of the following correctly describes the countercurrent mechanism of the nephron loop?
water moves out of the descending limb; sodium moves out of the ascending limb
The internal urethral sphincter is composed of ___ while the external sphincter is composed of ___
smooth muscles, skeletal muscles
Much of the sodium ions (Na+) are
reabsorbed thruogh the wall of the renal tubule by active transport
The vasa recta are branches from the pretubular capillary system are closely associated with
the juxtamedullary nephrons
The renal medulla is composed of conical masses of tissue called
Most of potassium ions (K+) in the glomerular filtrate are actively reabsorbed in the proximal convoluted tubule, but some may be secreted in the distal convoluted tubule. Under the influence of Aldosterone, potassium ions are
passively secreted in the renal distal convoluted tubule
The inter lobar vein drains into
the renal vein, to the vena cava
What is the purpose of the countercurrent mechanism in the nephron?
It creates a highly concentrated interstitial medulla fluid so that urine can be concentrated by the collecting ducts due to increase water reabsorption
Aldosterone from the adrenal cortex causes sodium to be