Renin-Angiotensin-Aldosterone System (RAAS) Quiz

What is the role of the antidiuretic hormone during RAAS? a) Causes the kidneys to keep water b) Leads to vasoconstriction of vessels c) Activates the release of angiotensin I d) Prevents the activation of the parasympathetic nervous system

a) Causes the kidneys to keep water

During the renin-angiotensin-aldosterone system activation, what gland releases antidiuretic hormone (ADH)? a) Pituitary b) Thyroid c) Hypothalamus d) Adrenal cortex

a) Pituitary

What is the role of aldosterone? a) It causes constriction of vessels b) It causes the kidney to keep sodium and water c) It causes the kidneys to keep potassium and water d) It causes the kidneys to only keep water

b) It causes the kidneys to keep sodium and water. - The answer is B. Aldosterone helps to increase blood volume by causing the kidneys to keep sodium and water. When blood volume is increased it will help increase the blood pressure.

Select below the CORRECT sequence in how the renin-angiotensin-aldosterone system works: a) Angiotensin I -> Angiotensin II -> ACE -> Renin -> Angiotensinogen b) Renin-> Angiotensinogen -> Angiotensin I -> ACE -> Angiotensin II c) Renin -> Angiotensin I -> Angiotensinogen -> ACE -> Angiotensin II d) Angiotensinogen -> Renin -> ACE -> Angiotensin I -> Angiotensin II

b) Renin-> Angiotensinogen -> Angiotensin I -> ACE -> Angiotensin II

Select all the roles of angiotensin II when it is activated in the renin-angiotensin-aldosterone system: a) Activates bradykinin b) Triggers the release of aldosterone c) Increases the blood volume d) Causes vasodilation e) Increases systemic vascular resistance f) Causes the release of ADH (antidiuretic hormone)

b) Triggers the release of aldosterone c) Increases the blood volume e) Increases systemic vascular resistance f) Causes the release of ADH (antidiuretic hormone) - The answers are B, C, E, and F. Angiotensin II causes vasoconstriction (not dilation) which will increase systemic vascular resistance and blood pressure. It also increases blood volume by triggering the release of aldosterone by the adrenal cortex (which causes the kidneys to keep sodium and water) and antidiuretic hormone (ADH) by the pituitary gland, which causes the kidneys to keep water. It does not activate bradykinin.

During RAAS activation, what gland releases aldosterone? a) Hypothalamus b) Thymus c) Adrenal cortex d) Pituitary

c) Adrenal cortex

What component of the RAAS (renin-angiotensin-aldosterone system) is created and found in the liver that is activated by renin? a) Aldosterone b) Angiotensin I c) Angiotensinogen d) Angiotensin II

c) Angiotensinogen

What is the goal of the renin-angiotensin-aldosterone system (RAAS)? a) Decrease blood pressure b) Increase the heart rate c) Increase the blood pressure d) decrease the heart rate

c) Increase the blood pressure

What is the role of ACE in the renin-angiotensin-aldosterone system? a) It activates angiotensinogen which turns into angiotensin I b) It causes the kidney cells to release renin c) It causes angiotensin II to trigger the adrenal glands to produce aldosterone d) It converts angiotensin I into angiotensin II

d) It converts angiotensin I into angiotensin II

When the RAAS is activated due to a change in body hemodynamics, the __________________ stimulates the ___________________ cells in the kidneys to release _______________. a) Parasympathetic nervous system; mesangial; aldosterone b) Sympathetic nervous system; renin c) Parasympathetic nervous system; juxtaglomerular; aldosterone d) Sympathetic nervous system; juxtaglomerular; renin

d) Sympathetic nervous system; juxtaglomerular; renin - The answer is D. The sympathetic nervous system stimulates the juxtaglomerular cells in the kidneys to release renin.