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

1	In the parietal cells, the enzyme carbonic anhydrase causes a reaction between...
	A)	carbon dioxide and water.
	B)	carbonic acid and water.
	C)	bicarbonate ions and hydrogen ions.
	D)	hydrogen ions and potassium ions.
	E)	hydrogen ions and chloride ions.
2	Ion exchange molecules in the plasma membrane of the parietal cells...
	A)	exchange a hydrogen ion coming in for a potassium ion going out.
	B)	exchange bicarbonate ions going out for hydrogen ions coming in.
	C)	exchange chloride ions going out for potassium ions coming in.
	D)	exchange hydrogen ions going out for chloride ions coming in.
	E)	exchange bicarbonate ions going out for chloride ions coming in.
3	Hydrochloric acid is formed when...
	A)	hydrogen ions and chloride ions join in the parietal cell cytoplasm.
	B)	hydrogen ions and chloride ions join in the parietal cell nucleus.
	C)	hydrogen ions and chloride ions join in the stomach lumen.
	D)	hydrogen ions and chloride ions join in the duct of the gastric gland.
4	In the parietal cell, carbonic acid dissociates into a bicarbonate ion and a hydrogen ion.
	A)	True
	B)	False
5	The carbonic acid ion is then joined to a hydrogen ion by the enzyme carbonic anhydrase.
	A)	True
	B)	False