Manitoba Nephrology Nurse Practice Test

Which structure follows the proximal convoluted tubule in the nephron?

1. Glomerulus

2. Loop of Henle

3. Collecting duct

4. Distal convoluted tubule

The correct answer is: Loop of Henle

The structure that follows the proximal convoluted tubule in the nephron is the Loop of Henle. After the filtrate leaves the proximal convoluted tubule, it enters the Loop of Henle, which consists of a descending and an ascending limb. This part of the nephron plays a crucial role in concentrating urine and regulating the water and electrolyte balance in the body. In the Loop of Henle, the process of counter-current multiplication occurs, which allows for the reabsorption of water and solutes. This segment is vital for creating a concentration gradient in the renal medulla, enabling the efficient reabsorption of water in the collecting ducts later in the nephron. Understanding the sequence of structures within the nephron is essential for grasping the overall function of the kidneys in filtration and fluid balance. The other structures mentioned do not immediately follow the proximal convoluted tubule in the nephron's sequence.