Question

an increase in adh activity will result in a direct effect causing a direct: increase in icf osmolarity. decrease in icf osmolarity. decrease in ecf osmolarity. increase in ecf osmolarity.

Explanation:

ADH (Antidiuretic Hormone) increases water reabsorption in the kidneys, leading to more water in the extracellular fluid (ECF). An increase in water in ECF dilutes the solutes, thus decreasing ECF osmolarity. ICF (Intracellular Fluid) osmolarity is not directly affected by ADH's action on water reabsorption in the short - term direct effect. So the correct option is the one about the decrease in ECF osmolarity.

Answer:

C. decrease in ECF osmolarity (assuming the options are labeled A - E with A: increase in ICF osmolarity, B: decrease in ICF osmolarity, C: decrease in ECF osmolarity, D: increase in ECF osmolarity)