Fluid and Electrolyte Balance: Action of hormones

Question 1

Antidiuretic hormone is released by…

Answer 1

Posterior pituitary

Question 2

ADH is released in response to..

Answer 2

Increased osmolarity or decreased blood volume (and stress)

Question 3

ADH causes the kidney to..

Answer 3

Retain water

Question 4

Renin - angiotensin - aldosterone released in response to…

Answer 4

• Low blood volume
• Low blood pressure
• Low sodium
• High potassium
• Stress

Question 5

First step in Renin Angiotensin Aldosterone System

Answer 5

Renal juxtaglomerular cells sense decrease in blood pressure and release renin

Question 6

Renin Angiotensin Aldosterone System: after renin is released

Answer 6

Renin converts angiotensin to angiotensin I in bloodstream

Question 7

After angiotensin is concerted to angiotensin I…

Answer 7

ACE converts angiotensin I to angiotensin II in the lungs

Question 8

What does angiotensin II do?

Answer 8

Causes vasoconstriction and release of aldosterone from the adrenal cortex

Question 9

What does aldosterone do?

Answer 9

Causes Na and Water retention, K secretion and increased BP

Question 10

Diuretics and ACE inhibiters ______ blood pressure

Answer 10

Lower

Question 11

Aldosterone is a ______ ______

Answer 11

Mineral corticoid

Question 12

Atrial naturetic hormone is released from the…

Answer 12

Atria

Question 13

Atrial naturetic hormone is released in response to…

Answer 13

Increased blood volume (stretch) in atria detected by atrial endocrine cells

Question 14

Atrial naturetic hormone leads to… (general)

Answer 14

Sodium and water excretion

Question 15

Three effects of ANH release

Answer 15

• Increase glomerular filtration rate
• Inhibition of renin-angiotensin-aldosterone system
• Inhibition of proximal tubule Na+ reabsorption