USDA EATING
PATTERNS
ENZYMES OF THE
DIGESTIVE SYSTEM
MACRONUTRIENTS

CIRCULATORY AND
LYMPHATIC SYSTEMS
FOOD DIGESTION
AND ABSORPTION
100

This eating pattern translates dietary guidelines into recommended amounts from the major food groups.

What is the USDA Eating Pattern?

100

This enzyme in saliva begins the digestion of starch in the mouth.

What is salivary amylase?

100

These are the three energy-yielding macronutrients.

What are carbohydrate, fat, and protein?

100

These small blood vessels in the intestinal villi receive most water-soluble nutrients after absorption.

What are blood capillaries?

100

This process breaks food into smaller substances the body can use.


What is digestion?


200

At the 2,000-calorie level, the Healthy U.S.-Style Eating Pattern recommends this amount of fruit each day.

What is 2 cups per day?

200

This substance secreted by the stomach creates an acidic environment, denatures proteins, and activates pepsin.

What is hydrochloric acid or HCl?

200

Carbohydrate and protein each provide this many kilocalories per gram.

What is 4 kilocalories per gram?

200

These lymphatic vessels inside the intestinal villi receive most absorbed dietary fats.

What are lacteals?

200

This nutrient is primarily digested in the stomach.

What is protein?

300

At the 2,000-calorie level, the pattern recommends this amount of vegetables each day.

What is 2 and one-half cups per day?

300

This pancreatic enzyme digests most dietary fat in the small intestine.

What is pancreatic lipase?

300

This macronutrient provides 9 kilocalories per gram and is the most energy dense.

What is fat?

300

This blood vessel carries absorbed water-soluble nutrients from the digestive tract to the liver.

What is the hepatic portal vein?

300

These wave-like muscular contractions move food through the digestive tract.

What is peristalsis?

400

At the 2,000-calorie level, the pattern recommends this amount of dairy products each day.

What is 3 cups per day?

400

This pancreatic enzyme continues starch digestion in the small intestine.

What is pancreatic amylase?

400

Although protein can supply energy, this is its major role in the body.

What is building and repairing body tissues?

400

After transporting absorbed fats, the lymphatic system eventually empties its contents into this system.

What is the circulatory system or bloodstream?

400


These fingerlike projections and their microscopic extensions greatly increase the small intestine's absorptive surface.


What are villi and microvilli?

500

At the 2,000-calorie level, the pattern recommends this amount of protein foods each day.

What is 5 and one-half ounce-equivalents per day?

500

This enzyme breaks down the milk sugar lactose

What is lactase?

500

A food contains 10 grams each of carbohydrate, protein, and fat. It provides this many total kilocalories

What is 170 kilocalories?

500

This system transports absorbed nutrients to body cells and carries wastes away from them.

What is the circulatory system?

500

Digested nutrients enter the blood or lymph through this process.

What is absorption?

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