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प्रश्न
How is the amount of urine produced regulated?
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उत्तर १
The amount of urine produced depends on the amount of excess water and dissolved wastes present in the body. Other factors, such as an organism's habitat and hormones such as Anti-diuretic hormone (ADH), also regulate the amount of urine produced.
उत्तर २
- The amount of urine produced is controlled by a hormone released from the posterior lobe of the pituitary gland, called antidiuretic hormone (ADH) or vasopressin. This hormone's role is to promote the reabsorption of water from the nephric filtrate.
- When there is sufficient water in the blood, less ADH is secreted, resulting in less water being reabsorbed from the nephric filtrate and, therefore, more urine is produced. Conversely, when there is less water in the blood, more ADH is released, leading to increased water reabsorption by the blood capillaries surrounding the nephron, which reduces the amount of urine produced.
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संबंधित प्रश्न
Write the functions of Ureter.
Draw a neat labelled diagram of the human excretory system.
Explain the principle of dialysis with the help of a labelled diagram.
The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person's blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation.
(a) What are organs A?
(b) Name the waste substance B.
(c) What are (i) E, and (ii) F?
(d) Name G, H and I.
(e) What is the process described above known as?
Fill in the blank.
.................. produces bile pigments from the heamoglobin of broken RBCs.
What is dialysis? Under what condition is it carried out?
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1 to 8 are as follows:
1. Afferent arteriole from renal artery
2. efferent arteriole
3. Bowman’s capsule
4. Glomerulus;
5. Proximal convoluted tubule with blood capillaries;
6. Distal convoluted tubule with blood capillaries;
7. collecting tubule;
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Where does ultrafiltration take place?
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Which structure contains the highest concentration of urea?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Name the functional units of the kidneys.
Name the Following
The division of the kidney which is light in colour and subdivided into conical renal pyramids.
Complete the following sentence with appropriate word:
Human kidney is made up of ______.
Complete the following sentence with appropriate word:
______ is the functional unit of kidney.
Complete the following sentence with appropriate word:
The U-shaped portion of a nephron located in the medulla region is called ______.
Write the functional activity of the following structure:
Glomerulus
Choose the Odd One Out:
Choose the Odd One Out:
Choose the correct option.
In human beings, uric acid is formed due to metabolism of ______.
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
Give two examples of the following:
Water-soluble vitamins
