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प्रश्न
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
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उत्तर
Kidneys are the main excretory organ of the human body. There are about millions of nephron in each kidney. Each nephron contains a renal corpuscle and a renal tubule. The renal corpuscle consists of capillaries called the glomerulus, enclosed by a capsule called Bowman's capsule. The blood containing wastes (like urea) enters the glomerulus. The glomerulus filters the blood. During filtration, the filtrate (containing substances like glucose, amino acids, salts, water and urea) present in the blood travels through the renal tubule where materials needed by the body are reabsorbed, while the wastes like urea are collected and excreted in the urine. The nephron carries the urine into the collecting tubule of the kidney from where it is carried to the ureter. From the ureter, the urine passes into the urinary bladder. The urinary bladder stores the urine until it is forced out of the body, through an opening known as the urethra.
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संबंधित प्रश्न
_____________ secreted by the (ii) _____________ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii) ____________. Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) _____________ leading to the cause of a disease called (v) ______________.
Where is the dirty blood in our body filtered?
What is the role of glomerulus in the kidney?
Fill in the following blank with suitable word:
Bowman's capsule and tubule taken together make a..........
What do kidneys excrete?
Name the various organs of the human excretory system.
What is meant by dialysis? What type of patients are put on dialysis?
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Differentiate between the following pairs of term :
Renal pelvis and renal papilla
Choose the odd one out in the following series:
Proximal convoluted duct, loop of Henle, vein.
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.
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Write two differences in composition of the blood flowing through the blood vessels, 'A' and 'B'.
Give Technical Term:
The organ in man concerned with maintaining water balance in the body.
Complete the following sentence with appropriate word:
Human kidney is made up of ______.
Complete the following sentence with appropriate word:
The sum total of all the chemical reactions taking place in the cell is known as ______.
Complete the following sentence with appropriate words:
The outer surface of the kidney is ______ while the inner surface is ______.
The tadpole of frog lives in water, hence its mode of excretion is ______.
Identify the INCORRECT match.
Bilirubin and Biliverdin are pigments which are ____________.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
