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

1		Red blood cells are also called
			A)	hemoglobin.
			B)	monocytes.
			C)	white blood cells.
			D)	erythrocytes.
2		Red blood cells in an isotonic solution are
			A)	lozenge shaped.
			B)	shriveled.
			C)	empty membraned.
			D)	cube shaped.
3		Red blood cells put in a hypertonic solution will
			A)	not be affected in any way.
			B)	form linear edges.
			C)	shrivel and become crenated.
			D)	be destroyed by hemolysis.
4		Red blood cells put in a hypotonic solution will
			A)	not be affected in any way.
			B)	form linear edges.
			C)	shrivel and become crenated.
			D)	be destroyed by hemolysis.
5		Human erythrocytes function best in a
			A)	hypertonic solution.
			B)	isotonic solution.
			C)	hypotonic solution.
			D)	bacterial solution.