Atrial natriuretic peptide is a hormone that is made in the atria of the heart. The influence of this hormone is to ________.

A) enhance atrial contractions

B) activate the renin-angiotensin mechanism

C) prevent pH changes caused by organic acids

D) reduce blood pressure and blood volume by inhibiting sodium and water retention

Answer: D

Which of the following hormones is important in the regulation of sodium ion concentrations in the extracellular fluid?

A) antidiuretic hormone

B) erythropoietin

C) aldosterone

D) renin

Answer: C

A) the feeling one might have after profuse sweating with exertion

B) the unpleasant feeling people have after drinking too much liquor

C) a condition that may result from renal insufficiency or drinking extraordinary amounts of water

D) a condition that is caused by high levels of sodium in the extracellular fluid compartment

Answer: C

A) calcium ions

B) potassium ions

C) hydrogen ions

D) sodium ions

Answer: D