Advertisements
Advertisements
प्रश्न
How is the amount of urine produced regulated?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
Draw a neat labelled diagram of the human excretory system.
If a patient is out on dialysis, he is most likely suffering from a severe ailment of the:
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system
In which of the following are the largest amounts of nitrogen excreted from a mammalian body?
(a) breath
(b) sweat
(c) urine
(d) faeces
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Choose the correct answer:
Narrow apex of pyramid in kidney is called ___________
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Why does the cortex of the kidney show a dotted appearance?
Give Technical Term:
The tube joining the kidney to the urinary bladder.
Give Technical Term:
The duct which transports urine from the kidney to the urinary bladder.
Write the functional activity of the following structure: Aldosterone
Choose the correct option.
Deproteinised plasma is not found in ______.
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
Answer the following question.
Name any one guanotelic organism.
Answer the following question.
Why do we get bad breath after eating garlic or raw onion?
Osmoregulation maintains the osmolarity of blood at about ______.
If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
Name the organs that store and release the urine.
An organ that produces urea:
Choose the odd one out in the following set and write the category for the remaining terms:
