A middle-aged man presents with congestive hea failure with elevated liver enzymes. His skin has a grayish pigmentation. The levels of liver enzymes are higher than those usually seen in congestive hea failure, suggesting an inflammatory process (hepatitis) with scarring (cirrhosis) of the liver. A liver biopsy discloses a marked increase in iron storage. In humans, molecular iron (Fe) is
Stored primarily in the spleen Stored in combination with ferritin Excreted in the urine as Fe2 positive Absorbed in the intestine by albumin