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प्रश्न
Explain the structure of nephron.
उत्तर
Each kidney consists of more than one million nephrons. Nephrons or uriniferous tubules are structural and functional units of the kidneys. Each nephron consists of Renal corpuscle or Malphigian corpuscle and renal tubule. The renal corpuscle consists of a cup-shaped structure called Bowman’s capsule containing a bunch of capillaries called glomerulus.
Blood enters the glomerular capillaries through afferent arterioles and leaves out through efferent arterioles. The Bowman’s capsule continues as the renal tubule which consists of three regions proximal convoluted tubule, U-shaped hairpin loop, the loop of Henle and the distal convoluted tubule. The distal convoluted tubule which opens into the collecting tubule. The
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संबंधित प्रश्न
State whether true or false. If false, correct the statement.
Glomerular filtrate consists of many substances like amino acids, vitamins, hormones, salts, glucose and other essential substances.
Assertion: Urea is excreted out through the kidneys.
Reason: Urea is a toxic substance.
Identify the part of nephron correctly matched to its function.
The loop of Henle and collecting ducts lie in the ____________ of the kidney.
What would be the outcome if the PCT is removed from the nephron?
The blood flowing through the renal artery is oxygenated and contains a lot of nitrogenous waste.
Match the items in Column I with those in Column II and write down the matching pairs.
| Column I | Column II | ||
| (a) | Bowman's capsule | (i) | Renal artery |
| (b) | Contains more CO2 and less urea | (ii) | Regulates amount of water excreted |
| (c) | Antidiuretic hormone | (iii) | Renal vein |
| (d) | Contains more urea | (iv) | Glomerulus |
Choose the odd one out in the following set and write the category for the remaining terms:
Write the exact location of the following:
Malpighian capsule
The figure given below represents a kidney tubule in humans and its blood supply. Study the figure and answer the questions that follow. Write specific name and numbers shown in the diagram for each answer.
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- Name the part which consists of a knot - like mass of blood capillaries.
- What is the specific name for the combination of parts shown as 5 and 3?
- Name the part which collects the glomerular filtrate.
- Where is the most water reabsorbed?
- Name the part which collects urine in the diagram shown.
- Which part lies in the medulla of the kidney?
- Which of the above parts is involved in the process of tubular secretion?
- How is hydrostatic pressure created?
- Where does ultrafiltration take place?
- Name two important constituents of urine.
