Question

There can be more than one correct answer! Thanks

11. What is the function of ACE?

A. stimulates the release of renin

B. increases reabsorption of Na+

C. converts antiotensin I into angiotensin II

D. increases reabsorption of H2O

E. increases secretion of K+

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12. Renin _____

A. increases Na+ reabsorption

B. is released by JG cells when macula densa cells detect slower flow of NaCL thorough the distal convoluted tubule

C. is released by JG cells when the pressure in the afferent arteriole increases

D. stimulates the release of aldosterone from the adrenal cortex

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13. Which of the following changes will lead to a decrease in Na+ reabsorption?

A. decreased stroke volume

B. dilation of afferent arterioles

C. decreased paracrine agent delivered to JG cells by macula densa

D. less angiotensinogen secreted by the liver

E. less ANP secreted by the atria

Answer 1

ANS 11) ACE that is Angiotensin Converting Enzyme part of RAS (Renin-angiotensin system) by regulation and control of body fluids, aids in controlling the blood pressure. It also converts angiotensin I hormone into angiotensin II making blood vessels to constrict.

Therefore option C. converts antiotensin I into angiotensin is the correct answer.

ANS 12) Renin is released by JG (juxtaglomerular) kidney cells when macula densa cells detect the slower flow of NaCL( sodium choride) thorough the distal convoluted tubule present in the kidney.The main function of Renin is to activate RAS renin angiotensin system that helps in conversion of angiotensin II which further helps in release of aldosterone hormone from the adrenal cortext leading to blood pressure increase and reabsorption of sodium ions.

Therefore option A,B and D are the correct answer.