The first structure in the kidney to collect newly formed urine is the a. renal capsule. b. minor calyx. c. renal pelvis. d. renal sinus. e. renal cortex.
The correct answer and explanation is:
The correct answer is b. minor calyx.
The kidney’s structure is designed to filter blood and form urine. As blood passes through the glomerulus, it is filtered into the Bowman’s capsule. The filtrate then moves into the proximal convoluted tubule and travels through the nephron. After the filtrate is processed, it becomes urine and moves into the collecting ducts.
The collecting ducts converge to form larger structures known as the minor calyces, which are the first structures to collect newly formed urine from the collecting ducts. Each minor calyx collects urine from several collecting ducts, and multiple minor calyces drain into a larger structure called the major calyx. From there, urine flows into the renal pelvis, which is the funnel-shaped reservoir that directs urine into the ureter for transport to the bladder.
To summarize the sequence:
- Collecting ducts: Urine forms here after filtration.
- Minor calyces: Collect newly formed urine from the collecting ducts.
- Major calyces: Drain urine from the minor calyces.
- Renal pelvis: Collects urine from the major calyces and directs it into the ureter.
The renal capsule, also called the renal capsule, is a protective outer layer surrounding the kidney. The renal cortex is the outer region of the kidney where the renal corpuscles and tubules are located. The renal sinus is the cavity within the kidney that houses the renal pelvis, calyces, and blood vessels, but it does not directly collect urine.
In conclusion, the minor calyx is the first structure to collect newly formed urine, starting the process of urine drainage out of the kidney.