Question

Sodium depletion differs from water depletion in that 

A. Cardiovascular changes are less pronounced. 

B. Intracellular fluid volume is less affected. 

C. The haematocrit increases. 

D. Thirst is more severe. 

E. Antidiuretic hormone levels are higher.

Answer 1

A. False Blood volume is more reduced with sodium depletion; cardiovascular changes are more pronounced. 

B. True Extracellular volume is a function of body sodium content. 

C. False It increases in both cases. 

D. False Hypertonicity is the main stimulus causing thirst. 

E. False Here also, hypertonicity is the main stimulus for ADH secretion.