NEET2014ZoologyExcretory Products and their EliminationActual
During urine formation, which of the following processes create high osmotic pressure in the uriniferous tubule?
Options
- AActive Na ⁺ absorption, followed by absorption of Cl ⁻
- BActive Cl ⁻ absorption, followed by absorption of Na ⁺
- CActive secretion of Na ⁺ into efferent arteriole followed by absorption of Cl ⁻ into efferent renal arteriole
- DActive secretion of Cl ⁻ and absorption of N ⁺ a into efferent renal arteriole
Correct answer
A. Active Na ⁺ absorption, followed by absorption of Cl ⁻
Step-by-step solution
- Active sodium absorption is followed by the absorption of chlorine. Sodium is the positively charged electrolyte in extracellular body fluid. The amount of sodium in the fluid influences its volume, which in turn determines blood volume and blood pressure. - Most of the sodium is reabsorbed in the form of sodium bicarbonate and sodium chloride. - About (70 % ) of the sodium reabsorption occurs in the proximal convoluted tubule. When sodium ion moves, water follows. The movement of water balances the osmotic press