Which one is the vasoconstrictor?

Which one amongst the following is a powerful vasoconstrictor ?

Which one amongst the following is a powerful vasoconstrictor ?

Which one will be the strongest reducing agent and which one will be the weakest one ?

What is the hormone which functions both as vasodilator and vasoconstrictor? Describe the functions of this hormone.

Which of the following hormone/enzyme is/are correctly paired with its function? I. Renin - Enzyme that catalyses the formation of angiotensin I. II. Aldosterone - Regulate water reabsorption at the distal convoluted tubule. III. Antidiuretic hormone -It is a powerful vasoconstrictor that stimulates the secretion of aldosterone. IV. Angiotensin II - Promotes reabsorption of sodium at distal convoluted tubule.

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

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

Which one is lightest and which one is heaviest of all the metals?