What are the different stages in urine formation? Explain what happens in those stages.
Answer
268.6k+ views
Hint: Urine is formed in the kidneys of a human being. The urine is passed from kidney to bladder through the ureters. The urine is stored in the bladder. On urination, it is passed from bladder to urethra followed by excretion from the body.
Complete answer:
Urine is formed in the kidneys of a human being. The urine is passed from kidney to bladder through the ureters. The urine is stored in the bladder. On urination, it is passed from bladder to urethra followed by excretion from the body. There are three stages in the formation of urine. It includes:
> Glomerular filtration— It begins from here when the blood is filtered into the bowman‘s capsule through glomerulus. It results in the formation of glomerular filtrate. The afferent arteriole is wider than the efferent leading to increase in blood pressure. This filtrate is formed of all blood components with two exceptions i.e corpuscles and plasma proteins.
> Tubular reabsorption — when the filtrate comes to the proximal tubule all the essential nutrients get reabsorbed. These include glucose, amino acids, water, ions like sodium, potassium, chloride, bicarbonates, calcium and magnesium. The filtrate then moves to collect the duct. It reabsorbs excess water. This results in decreased urine volume.
> Tubular secretion — on reaching the proximal tubule, creatinine and uric acid are secreted in the filtrate along with potassium and small amounts of hydrogen ions.
Note: The average urine output for one day is 800-2000 ml. The normal pH of urine is 6.0 to 7.5 ie slightly acidic in nature but the normal range is 4.5 to 8.0. Urine is formed in the kidneys of a human being.
Complete answer:
Urine is formed in the kidneys of a human being. The urine is passed from kidney to bladder through the ureters. The urine is stored in the bladder. On urination, it is passed from bladder to urethra followed by excretion from the body. There are three stages in the formation of urine. It includes:
> Glomerular filtration— It begins from here when the blood is filtered into the bowman‘s capsule through glomerulus. It results in the formation of glomerular filtrate. The afferent arteriole is wider than the efferent leading to increase in blood pressure. This filtrate is formed of all blood components with two exceptions i.e corpuscles and plasma proteins.
> Tubular reabsorption — when the filtrate comes to the proximal tubule all the essential nutrients get reabsorbed. These include glucose, amino acids, water, ions like sodium, potassium, chloride, bicarbonates, calcium and magnesium. The filtrate then moves to collect the duct. It reabsorbs excess water. This results in decreased urine volume.
> Tubular secretion — on reaching the proximal tubule, creatinine and uric acid are secreted in the filtrate along with potassium and small amounts of hydrogen ions.
Note: The average urine output for one day is 800-2000 ml. The normal pH of urine is 6.0 to 7.5 ie slightly acidic in nature but the normal range is 4.5 to 8.0. Urine is formed in the kidneys of a human being.
Last updated date: 25th Sep 2023
•
Total views: 268.6k
•
Views today: 6.68k
Recently Updated Pages
What do you mean by public facilities

Difference between hardware and software

Disadvantages of Advertising

What is the Full Form of DNA and RNA

Coping with Environmental Loss

What is the Full Form of AIDS and Full Form of HIV

Trending doubts
How do you solve x2 11x + 28 0 using the quadratic class 10 maths CBSE

What is the IUPAC name of CH3CH CH COOH A 2Butenoic class 11 chemistry CBSE

Drive an expression for the electric field due to an class 12 physics CBSE

Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

Difference Between Plant Cell and Animal Cell

The dimensions of potential gradient are A MLT 3A 1 class 11 physics CBSE

Define electric potential and write down its dimen class 9 physics CBSE

Why is the electric field perpendicular to the equipotential class 12 physics CBSE
