Question

The mechanism of urine formation in nephron
involves
(a) ultra-filtration (b) absorption
(c) diffusion (d) osmosis

Answer 1

The mechanism of urine formation in nephron involves:

(a) ultra-filtration

• Ultra-Filtration can be defined as the process of removal of fluid from a patient’s body.

• This function is performed by the kidney.

• There are more than 1 million nephrons inside a kidney and each nephron comprise of glomerulus where the blood filtration occurs. This type of filtration is called glomerular filtration.

• This filtration is also known as ultra-filtration.

Answer 2

The mechanism of urine formation in nephron  involves ultra-filtration.

Option (A) is correct.

Explanation:

• Ultra-filtration occurs at the barrier between the blood and the filtrate in the Bowman's capsule of the nephron.
• The Bowman's capsule contains a dense capillary network called the glomerulus.
• Blood flows into these capillaries through the afferent arteriole and leaves through the efferent arteriole.
• The blood pressure in the efferent arteriole is higher than the blood pressure in the afferent arteriole.
• This is because the efferent arteriole has a smaller diameter than the afferent arteriole.

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