Question

how is urine produced long for 5 marks​

Answer 1

Answer:

Urine is a waste product formed by the body.

Formation of urine depends on

• Excess water in body.
• Waste products qualify in blood.
• Temperature of the body.

Urine is formed in the kidneys.

The blood is filterd in the kidneys, by millions of small objects known as nephrons packed closely together, The blood is filtered in the Biwman's capsule and the filterate is collected in the collectind duct.

The original filterate is about 200 liters but due to reabsorption and refilteration, the final quantity is about 1-1.5 Litres of urine

Answer 2

.｡.:*✧hєчαα mαtє !❤✧*:.｡.

◆━━━━━━━▣✦▣━━━━━━━━◆

Mechanism of urine Formation

The mechanism of urine formation involves the following steps:

■ Glomerular Filteration :

Glomerular filtration occurs in the glomerulus where blood is filtered. This process occurs across the three layers- epithelium of Bowman’s capsule, endothelium of glomerular blood vessels, and a membrane between these two layers.

Blood is filtered in such a way that all the constituents of the plasma reach the Bowman’s capsule, except proteins. Therefore, this process is known as ultrafiltration.

■ Reabsorption :

Around 99 percent of the filtrate obtained is reabsorbed by the renal tubules. This is known as reabsorption. This is achieved by active and passive transport.

■ Secretion :

The next step in urine formation is the tubular secretion. Here, tubular cells secrete substances like hydrogen ion, potassium ion, etc into the filtrate. By this process, the ionic, acid-base and the balance of other body fluids are maintained. The secreted ions combine with the filtrate and form urine. The urine passes out of the nephron tubule into a collecting duct.

◆━━━━━━━▣✦▣━━━━━━━━◆

hᎾᏢᎬ u ᏞᎥᏦᎬ ᎥᏆ !❤┈━═☆