Renin-Angiotensin-Aldosterone System (RAAS) Quiz

A. Hypothalamus

When a patient is low on fluid or has a high plasma osmolality, what structure in the body responds to this issue first in the thirst mechanism? A. Hypothalamus B. Thalamus C. Adrenal glands D. Kidneys

D. The sympathetic nervous system stimulates the juxtaglomerular cells in the kidneys to release renin.

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; podocytes; renin C. parasympathetic nervous system; juxtaglomerular; aldosterone D. sympathetic nervous system; juxtaglomerular; renin

C. Adrenal cortex

During RAAS activation, what gland releases aldosterone? A. Hypothalamus B. Thymus C. Adrenal cortex D. Pituitary

A. Pituitary Gland

During the renin-angiotensin-aldosterone system activation, what gland releases antidiuretic hormone (ADH)? A. Pituitary Gland B. Thyroid C. Hypothalamus D. Adrenal cortex

True

Osmoreceptors in the hypothalamus cause antidiuretic hormone to be released. True or False?

The answers are A, D, E, and F. Angiotensin II will cause: vasoconstriction, lead to the release of aldosterone and ADH, and stimulate the thirst mechanism. It will INCREASE blood volume (not decrease) because it has a goal of increasing blood pressure.

Select all the roles of Angiotensin II: A. Vasoconstriction B. Vasodilation C. Release renin D. Lead to the release of aldosterone E. Lead to the release of ADH F. Stimulate thirst mechanism G. Decrease blood volume

The answers are B, C, E, and F. Angiotensin Il 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.

Select all the roles of angiotensin Il 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. Renin-> Angiotensinogen -> Angiotensin I -> ACE -> Angiotensin II

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 I| D. Angiotensinogen -> Renin -> ACE -> Angiotensin I -> Angiotensin ||

C. Angiotensinogen

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 I|

C. Renin. Juxtaglomerular cells respond to a low blood pressure and released renin.

What does the juxtaglomerular cells release as part of the Renin-Angiotensin-Aldosterone System? A. Aldosterone B. Antidiuretic hormone C. Renin D. Angiotensin I|

A. ANP. This stands for atrial natriuretic peptide.

What hormone is released by the heart cells due to atrial wall stretching? A. ANP B. BNP C. Aldosterone D. Antidiuretic hormone

B. BNP. This stands for brain natriuretic peptide and is released by heart cells due to ventricle wall stretching.

What hormone is released by the heart cells due to ventricle wall stretching? A. ANP B. BNP C. Aldosterone D. Antidiuretic hormone

The answers are B and C. These are natriuretic peptides that work against Angiotensin Il and stop the effects of aldosterone, ADH, and renin.

What hormones work against the effects of Angiotensin II? Select all that apply: A. Aldosterone B. Atrial natriuretic peptide C. Brain natriuretic peptide D. Renin

C. Increase the blood pressure

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

B. Reabsorb water to increase blood volume. This is the purpose of antidiuretic hormone.

What is the purpose of antidiuretic hormone (ADH)? A. Reabsorb sodium and water to increase fluid volume in the blood B. Reabsorb water to increase blood volume C. Cause vasoconstriction to increase blood volume D. Waste sodium and water to increase blood volume

B. It turns angiotensin I into angiotensin II. ACE, Angiotensin-Converting Enzyme, has an important role for converting Angiotensin I into Angiotensin II.

What is the role of ACE (Angiotensin-Converting Enzyme)? A. Turns renin into angiotensin I| B. Turns angiotensin I into angiotensin II C. Turns angiotensin I into aldosterone D. Turns angiotensin I into renin

D. It converts angiotensin I into angiotensin II.

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 Il to trigger the adrenal glands to produce aldosterone. D. It converts angiotensin I into angiotensin II.

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.

What is the role of aldosterone? A. It causes constriction of vessels. B. It causes the kidneys to keep sodium and water. C. It causes the kidneys to keep potassium and water. D. It causes the kidneys to only keep water.

A. Causes the kidneys to keep water

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

D. Liver. The liver activates angiotensinogen when it senses the presence of renin in the circulation.

What organ(s) in the body activates angiotensinogen when it senses the presence of renin in the circulation? A. Kidney B. Heart C. Lungs D. Liver

The answers are C and E. These structures of the nephron are affected by ADH and reabsorb water back into the blood stream. Therefore, water goes back into the plasma and helps increase blood volume.

What parts of the nephron in the kidney respond to antidiuretic hormone (ADH)? Select all that apply: A. Loop of Henle B. Bowman's capsule C. Distal convoluted tubule D. Proximal convoluted tubule E. Collecting duct

C. Hypothalamus. This structure makes ADH, but it is stored and secreted by the posterior pituitary gland.

What structure in the body makes antidiuretic hormone (ADH)? A. Kidneys B. Posterior pituitary gland C. Hypothalamus D. Adrenal cortex

B. Posterior pituitary gland. This structure stores and secretes ADH. ADH is made in the hypothalamus.

What structure stores and secretes ADH? A. Kidneys B. Posterior pituitary gland C. Hypothalamus D. Adrenal cortex

D. Angiotensin I. Angiotensinogen turns into Angiotensin I.

What substance does angiotensinogen turn into in RAAS? A. Angiotensin Il B. Renin C. Aldosterone D. Angiotensin I