Question

Collecting tubule opens in which part of the kidney?
A) Outer cortex
B) Inner medulla
C) Renal pelvis
D) Ureter

Answer 1

Every organism's survival is dependent on a set of fundamental activities. One of them is excretion. Distinct species have different excretion methods. The human excretory system is a sophisticated excretory system found in complex creatures such as humans. We get our nutrients from a variety of places, which are then digested and processed by our bodies. The body begins to filter out helpful and harmful chemicals in an individual after metabolic processes. As we all know, toxin buildup may be hazardous, and the body eliminates all metabolic wastes through a process known as excretion.

Complete answer:
Kidneys are bean-shaped structures that are protected by the ribs and back muscles on each side of the spine. Each adult human kidney measures 10-12 cm in length, 5-7 cm in breadth, and weighs 120-170 grams.

The inner surface of the kidneys is concave. The hilum, a notch on the inner concave surface of the kidney, is where blood arteries, ureters, and nerves enter the kidneys. The renal pelvis, a huge funnel-shaped area located within the hilum, includes many projections called calyces.

The kidney's collecting duct system is made up of tubules and ducts that physically connect nephrons to either a minor calyx or the renal pelvis. The collecting duct system is the final portion of the nephron and is involved in electrolyte and fluid balance via reabsorption and excretion, processes that are controlled by the hormones aldosterone and vasopressin (antidiuretic hormone).

Thus, The collecting tubules of the nephrons are in charge of collecting urine filtrate from the distal convoluted tubule and transporting it to the renal pelvis. Urine travels from the renal pelvis to the ureters.

As a result, the correct answer is option ‘C’ i.e, 'Renal pelvis.'

Note: Henle's loop, which has an ascending and descending limb, is the next section of the tubule. As a distal convoluted tubule, the ascending loop continues. Many nephrons' distal convoluted tubules open into the collecting duct. Malpighian corpuscle, proximal convoluted tubule, and distal convoluted tubule make up the cortical area of the kidney, whereas a loop of Henle makes up the medullary region.