View the animation below, then complete the quiz to test your knowledge of the concept.

1	The hydrogen ions used to form hydrochloric acid in the stomach are derived from
	A)	chloric acid.
	B)	citric acid.
	C)	carboxylic acid.
	D)	carbonic acid.
	E)	carbalcoholic acid.
2	The ion exchange molecule in the plasma membrane of parietal cells exchanges ________ ions going out for ________ ions coming in.
	A)	bicarbonate ; chloride
	B)	bicarbonate ; potassium
	C)	bicarbonate ; hydrogen
	D)	potassium ; bicarbonate
	E)	chloride ; bicarbonate
3	________ ions are actively transported into the gastric gland duct, in exchange for ________ ions which enter the parietal cells.
	A)	Potassium ; hydrogen
	B)	Potassium ; chloride
	C)	Hydrogen ; potassium
	D)	Hydrogen ; chloride
	E)	Chloride ; potassium
4	The first step in the formation of hydrochloric acid is the active transport of carbon dioxide into the parietal cells.
	A)	True
	B)	False
5	The enzyme carbonic anhydrase catalyzes the formation of bicarbonate from carbon dioxide and hydrogen.
	A)	True
	B)	False