1
Question
The water is reabsorbed under the influence of ADH. it is
The water is reabsorbed under the influence of ADH. it is
Open in App
Solution
The correct option is C Facultative
The reabsorption of water in the earlier parts of the nephron (regardless of a person's state of hydration), independent of ADH is termed as 'obligatory reabsorption of water', whereas the water reabsorption in the distal part of the nephron (in accordance with the body's state of hydration), under the influence of ADH, is termed as 'facultative reabsorption of water'.
In facultative reabsorption, the collecting ducts become more permeable to water due to the effect of ADH, so water is reabsorbed by osmosis. Osmosis is a passive process (the diffusion of water from an area of higher water concentration to an area of lower water concentration), no expenditure of ATP energy is required in it.
Thus water reabsorption under the influence of ADH is facultative and passive reabsorption.
The reabsorption of water in the earlier parts of the nephron (regardless of a person's state of hydration), independent of ADH is termed as 'obligatory reabsorption of water', whereas the water reabsorption in the distal part of the nephron (in accordance with the body's state of hydration), under the influence of ADH, is termed as 'facultative reabsorption of water'.
In facultative reabsorption, the collecting ducts become more permeable to water due to the effect of ADH, so water is reabsorbed by osmosis. Osmosis is a passive process (the diffusion of water from an area of higher water concentration to an area of lower water concentration), no expenditure of ATP energy is required in it.
Thus water reabsorption under the influence of ADH is facultative and passive reabsorption.
Suggest Corrections
0
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
