Question

2.
Statements related to the formation of urine are given below.
Arrange them in the figure appropriately.
Ultrafiltration takes place.
Collects urine.
Glucose, amino acid, sodium, potassium etc. are
reabsorbed here.
Urea, sodium, potassium ions etc are secreted here.
K​

Answer 1

ANSWER:

The formation of urine takes place by the following steps;.

(a) Ultra filtration or glomerular filtration.

(b) Selective reabsorption

(c) Tubular secretion

Ultrafiltration 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.

The high hydrostatic pressure forces small molecules such as water, glucose, amino acids, sodium chloride and urea through the filter, from the blood in the glomerular capsule across the basement membrane of the Bowman's capsule and into the nephron. This process is called ultrafiltration. The fluid filtered in this way is called glomerular filtrate.