Question

Angiotensinogen is converted to angiotensin by
A. Renin
B. ADH
C. ANF
D. Aldosterone

Answer 1

Hint: Angiotensinogen is a protein that is produced by the liver, where this protein does not have any direct function in the body, and in turn, it is broken by an enzyme produced by the kidney to form the angiotensin I, and further metabolism occur.

Complete answer:
Whenever there is a decrease or fall in the blood pressure, life produces a protein called angiotensinogen.
In the body whenever there is a decrease in sodium levels and a decrease in blood pressure an enzyme called renin is secreted
This angiotensinogen is broken down by the presence of an enzyme called renin which is secreted by the kidney.
Renin converts the angiotensinogen into angiotensin I, where this angiotensin I do not have any direct effect on the body, and this angiotensin is further converted to angiotensin II, and this act on various organisms to raise the blood pressure.
Angiotensin II acts on blood vessels where it raises the blood pressure by narrowing the vessels.
And it acts on the nerves, and nerves stimulate and increase the thirst and feeling of having salt, to increase the water intake.
It acts on adrenal glands, and these glands release the aldosterone where it causes the sodium to remain in the body and to lose the potassium by the kidneys.
And the kidneys also increase water reabsorption and increase blood volume, etc.
This renin-angiotensin system is also activated by hormones such as corticosteroids, to increase the overall blood pressure in the body.
So the correct option is A.

Note: In the body whenever there is a fall in blood pressure, kidneys secrete the enzyme renin that converts the angiotensinogen to angiotensin I, and this is converted to angiotensin II while going through the lungs to kidneys, where it acts on various organs of the body to raise the blood pressure.