Angiotensinogen is a protein secreted by which of the following organs?

$A$ decrease in blood pressure/volume will not cause the release of

The occurrence of diuresis following saline ingestion is due to:

When a person is suffering from poor renal reabsorption,which of the following will not help in the maintenance of blood volume?

Given below are two statements.
Statement $I$: Macula densa and $JG$ cells together form the $JG$ apparatus.
Statement $II$: The $JG$ apparatus plays an important role in reabsorption of glucose within kidney.
In the light of above two statements,choose the correct answer from options given below.

Which of the following causes an increase in sodium reabsorption in the distal convoluted tubule?