Which of the following statement is/are true? 

I. Glomerular filtrate is isotonic to plasma.

II. When the urine passes into collecting tubule, it becomes hypotonic.

III. Filtrate is isotonic in proximal convoluted tubule.

IV. Filtrate becomes more and more hypotonic as it passes through descending limb of Henle's loop. Choose the correct option

Which of the following features activates the JG cells?
I. Fall in Glomerular blood pressure

II. Fall in Glomerular blood flow 

III. Fall in GFR

Choose the correct option

Read the following points :-
(i) Increases GFR
(ii) Increases B.P.
(iii) Decreases blood volume
(iv) Increases aldosterone secretion
(v) Vasoconstrictor
(vi) Increases Na ion excretion
How many points are correct about Angiotensin II?