HISTOLOGY
URINARY SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Urine is formed in a three-step process. Which of the following gives the correct order in which these steps take place in the nephron?
|
|
tubular secretion, tubular reabsorption, glomerular filtration
|
|
|
tubular reabsorption, tubular secretion, glomerular filtration
|
|
|
glomerular filtration, tubular reabsorption, tubular secretion
|
|
|
glomerular filtration, tubular secretion, tubular reabsorption
|
Explanation:
Detailed explanation-1: -Urine formation takes place in three steps namely, glomerular filtration, selective reabsorption and tubular secretion. In the first step, blood containing nitrogenous wastes is filtered through a tuft of capillaries called glomerulus. This is followed by selective reabsorption of glucose, amino acids etc.
Detailed explanation-2: -The filtrate flows from the proximal tubule and into the Loop of Henle. The loop of Henle concentrates the filtrate, by removing more water from it, and passes it to the distal tubule. From the distal tubule it travels to the collecting duct-now called urine.
Detailed explanation-3: -Glomerular filtration removes solutes from the blood; it is the first step of urine formation.
There is 1 question to complete.