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प्रश्न
Answer the following in detail.
Describe the process of urine formation.
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उत्तर
The process of urine formation takes place in the following steps:
- Glomerular Alteration: Blood containing waste material enters the kidneys through the renal artery. It then enters the glomerulus under high pressure. Water and small solutes are filtered in the Bowman’s capsule.
- Tubular reabsorption: Filterate passes through the thin walls of the Bowman’s capsule into the urinary or renal tubule. As it passes through the tubule, water, and many useful substances are reabsorbed by the renal blood capillaries.
- Tubular secretion: The remaining liquid, along with wastes such as urea, uric acid, etc., is called urine and is collected in the urinary bladder.
- Excretion: Urine leaves the kidneys and passes into the urinary bladder through the ureters. When the urinary bladder is full, urine is passed out through the urethra.
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संबंधित प्रश्न
What does the bladder in our body do?
The substance which is not reabsorbed into the blood capillaries surrounding the tuble of a nephron is mainly:
(a) glucose
(b) amino acid
(c) urea
(d) water
If you donate one kidney to a needy patient, would it cause any harm to you? Give reason.
Differentiate between the following pairs of term :
Renal cortex and renal medulla
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
Study the diagram given alongside and then answer the question that follow:
Name the stages involved in the formation of urine.
Study the diagram given below and then answer the questions that follow:
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- Name the region in the kidney where the above structure is present?
- Name the parts labelled 1, 2, 3 and 4.
- Name the stages involved in the formation of urine.
- What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
When uric acid is produced in excess, it gets deposited in joints, resulting in ____________.
Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?
