Process of Excretion in Nephron
Process of Excretion in Nephron
The Process of Excretion in nephron: The process of excretion may be divided into three stages—filtration, selective reabsorption and tubular secretion.
Control of Excretion: The urine that is formed continually collects in the urinary bladder. As the bladder expands, its pressure creates an urge to pass urine through the urethra. As the bladder is muscular, the urge to urinate is under voluntary nervous control.
Filtration of blood occurs under high pressure in the nephrons of the _________________ . | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct ? (a) The filtrate contains water, glucose, salts, urea, vitamins, etc. It is called the glomerular filtrate. (b) The glomerular filtrate flows through the proximal convoluted tubule, the U-shaped Henle’s loop and the distal convoluted tubule. (c) As the bladder expands, its pressure creates an urge to pass urine through the urethra. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) Blood enters the glomerulus through the afferent arteriole (with a wider lumen) and leaves through the efferent arteriole (with a narrow lumen). (b) The filtrate contains urea, some salts and water. Re-absorption of solutes into the blood increases the water concentration of the filtrate . (c) Some nitrogenous waste products are removed from the blood by the distal convoluted tubule, and are then added to the urine. This is called control of excretion . | |||
| Right Option : A | |||
| View Explanation | |||
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