Question

The primary purpose of the collecting system is to?

1) transport urine from the urinary bladder to the urethra
2) selectively reabsorbs sodium ions from the plasma back into the filtrate
3) transport urine from the ureters to the bladder
4) transport urine from the bladder to the urethra
5) make final adjustments to the osmotic concentration and volume of urine

Answer 1

The collecting system's primary function is to make final adjustments to the osmotic concentration and volume of urine, and it involves reabsorption of water from urine in the collecting ducts.

Step-by-step explanation:

The primary purpose of the collecting system in the urinary system is to make final adjustments to the osmotic concentration and volume of urine. This system is essential for maintaining the body's fluid and electrolyte balance and involves a series of processes, including filtration, reabsorption, and secretion. After the urine is formed in the kidneys, it passes through the ureters, where it is temporarily stored in the urinary bladder before being excreted through the urethra. The collecting ducts, specifically, are responsible for reabsorbing water and returning it to the bloodstream, which in the presence of antidiuretic hormone can lead to the reabsorption of up to three-quarters of the water, thereby concentrating the urine.