Chapter 44.5

Question 1

Antidiuretic Hormone

Answer 1

• Antidiuretic hormone (ADH) makes the collecting duct epithelium more permeable to water

• An increase in osmolarity triggers the release of ADH, which helps to conserve water

Question 2

Cyclic Adenosine Mono-Phosphate (cAMP)

Answer 2

a small, hydrophilic molecule, which is an important intracellular second messenger molecule regulated in many physiological processes.

Second Messenger Hormone

Question 3

The Renin-Angiotensin-Aldosterone System (RAAS)

Answer 3

The renin-angiotensin-aldosterone system (RAAS) is part of a complex feedback circuit that functions in homeostasis

Question 4

Juxtaglomerular Apparatus (JGA)

Answer 4

A drop in blood pressure near the glomerulus causes the juxtaglomerular apparatus (JGA) to release the enzyme renin

drop in blood pressure releases renin

Question 5

Angiotensin II

Answer 5

• Raises blood pressure and decreases blood flow to the kidneys
• Stimulates the release of the hormone aldosterone, which increases blood volume and pressure

Renin triggers the formation of the peptide angiotensin II

Question 6

Aldosterone

Answer 6

Increases blood volume and pressure

Question 7

Atrial natriuretic peptide (ANP)

Atrial - From the Atrium

Answer 7

ANP is released in response to an increase in blood volume and pressure and inhibits the release of renin