Chapter 9

Choose factors that influence iron absorption.

Acidity improves iron absorption. Large doses of zinc or calcium decrease iron absorption. Meat, fish, and poultry improve nonheme iron absorption.

What are secondary functions of iron within the human body?

Brain function Immune function Part of many enzymes

Which of the following are functions of water?

Lubricates joints Medium for chemical reactions Maintains body temperature

Which of the following scenarios put a person at risk for potassium deficiency?

a deficient food intake, as may be the case with alcoholism an endurance athlete who sweats profusely during a training run in hot weather a person with bulimia nervosa who habitually purges excess calories by vomiting

The fluid that surrounds and protects the fetus during development is called ______ fluid.

amniotic

Choose the minerals that are stored in bones and teeth.fluoride

fluoride calcium phosphorus magnesium

The functions of fluoride include

helping teeth resist acids. blocking growth of bacteria. mineralizing tooth enamel.

Choose the mineral that is replaced by manufacturers when lost in the refinement process.

iron

Consuming too much sodium can increase a person's risk for

obesity. hypertension.

supplementation can decrease blood pressure.

potassium and magnesium

High levels of ingested fluoride can lead to

skeletal damage. tooth mottling.

Rank the following food sources from highest (at the top) to lowest (at the bottom) magnesium content.

spinach plain yogurt banana whole-wheat

Select the sources of fluoride.

tea seaweed fluoridated water

Iron, zinc, copper, iodide, selenium, molybdenum, fluoride, manganese, and chromium are all identified as

trace mineral

Choose the functions of iron.

transportation of carbon dioxide from cells to the lungs for excretion synthesis of collagen for bone health detoxification of drugs in the liver