Food and Nutrition: Chapter 13

What is the function of MFP factor and what foods is it found in?

Enhances absorption of non-heme iron from foods eaten at the same meal. found in meat, fish, poultry

What is the major storage form of iron?

Ferritin

What binds with zinc and limits its bioavailability?

Fiber and phytates

What are the best sources of fluoride?

Fluorinated water, tea, and seafood

What condition results from iodine deficiency?

Goiter - enlargement of the thyroid gland

What iron containing compound carries oxygen in the bloodstream?

Hemoglobin (RBCs)

Know the process of iron absorption and recycling

Iron in food, then mucosal cells in intestine store excess iron in mucosal ferritin, then if the body needs iron, it is released to mucosal transferrin

What factors enhance the absorption of iron?

MFP Factor and a genetic disorder hemochromatosis.

What protein carries oxygen in the muscle cells?

Myoglobin (muscle cells)

What condition does fluoride deficiency result in?

Susceptibility to tooth decay called fluorosis

Approximately what percentage of iron is normally absorbed overall?

18%

What is the average lifespan of the RBC?

4 months

What can result from iodine deficiency during pregnancy?

Cretinism

What foods have iron added to them in fortification?

grains

Zinc deficiency may result in what conditions?

growth retardation, arrested sexual maturation, diarrhea, impaired immune response, damage to the central nervous system and vitamin A deficient.

What are the best food sources of iodine?

iodized salt, seafood, bread, dairy

What deficiency would a low level of hemoglobin indicate?

iron deficient.

What foods reduce the absorption of iron?

milk, tea, or coffee

What are the best food sources of zinc?

oysters, sirloin steak, crab, ground beef

What is the major cause of iron deficiency?

poor nutrition

Who is most susceptible to iron deficiency?

woman, infants, children, vegtarians

What protein carries iron in the bloodstream?

Transferrin

Know the process of zinc absorption and recycling.

Zinc in food, mucosal cells store excess in metallothionein, metallothionein releases zinc to albumin and transferrin for transportation, pancreas uses zinc to make digestive enzymes and then are secreted into the intestine.

What transports zinc?

albumin and transferrin

What mineral is necessary for thyroxine production?

calcicontin