The hormone with enzymatic action which catalyses conversion of angiotensinogen into angiotensin is :a)ANFb)Reninc)JFAd)AldosteroneCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Angiotensin  is produced by the action of renin (an enzyme produced by the kidneys) on a protein called angiotensinogen, which is formed by the liver.

Answer

Renin also known as an angiotensinogenase is an aspartic protease protein and enzyme secreted by the kidneys in to the circulation in the response to the renal hypotension and hypernatremia sympathetic nerve activation

Answer

B.renin

Answer

Renin is the hormone with enzymatic action that catalyses the conversion of angiotensinogen into angiotensin.

Renin is an enzyme that is produced and released by specialized cells in the kidneys known as juxtaglomerular cells. It plays a crucial role in the regulation of blood pressure and fluid balance in the body. The renin-angiotensin system is a hormonal cascade that starts with the release of renin and ultimately results in the production of angiotensin II, a potent vasoconstrictor.

Conversion of angiotensinogen to angiotensin:
1. Angiotensinogen is a large protein that is produced by the liver and released into the bloodstream.
2. When blood pressure drops or there is a decrease in blood flow to the kidneys, juxtaglomerular cells in the kidneys release renin.
3. Renin acts on angiotensinogen and cleaves off a small peptide called angiotensin I.
4. Angiotensin I is then converted into angiotensin II by the action of an enzyme called angiotensin-converting enzyme (ACE), which is mainly found in the lungs.
5. Angiotensin II is a potent vasoconstrictor, meaning it causes the blood vessels to constrict, leading to an increase in blood pressure.
6. Angiotensin II also stimulates the release of aldosterone from the adrenal cortex, which promotes sodium and water reabsorption in the kidneys, further increasing blood pressure.

Functions of angiotensin:
1. Vasoconstriction: Angiotensin II causes the smooth muscle in the walls of blood vessels to constrict, leading to an increase in blood pressure. This helps to maintain blood flow to essential organs such as the brain and heart.
2. Release of aldosterone: Angiotensin II stimulates the release of aldosterone, a hormone that acts on the kidneys to promote sodium and water reabsorption. This helps to increase blood volume and, consequently, blood pressure.
3. Release of antidiuretic hormone (ADH): Angiotensin II stimulates the release of ADH, also known as vasopressin, from the posterior pituitary gland. ADH acts on the kidneys to increase water reabsorption, which helps to maintain blood volume and blood pressure.

In summary, renin is the hormone with enzymatic action that catalyses the conversion of angiotensinogen into angiotensin. This hormone is a key player in the renin-angiotensin system, which regulates blood pressure and fluid balance in the body.

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Suggested Free Tests

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company