Nutrition test 1

Max wants to increase his intake of vitamin C without taking a dietary supplement. When he shops for food, he reads Nutrition Facts labels. Which of the following kinds of information will help him choose foods that are the richest sources of vitamin C?

%DVs

Blood and blood vessels are primary components of the ________ system.

circulatory

Having a control group enables researchers to

compare findings of the control group with those of the experimental group

According to the U.S. Food and Drug Administration, which of the following substances can not be classified as a dietary supplement?

tobacco

In 2010, Americans ate more ________ than in 1970

total calories

The bladder and kidneys are organs of the ________ system.

urinary

A serving of food contains 2 g carbohydrate, 16 g protein, 6 g fat, 2 mcg vitamin B12, and 60 mg iron. Based on this information, this food provides ________ kcal/serving.

126

A teaspoon of sugar supplies about 16 kilocalories, which is the same as ________ calories.

16,000

The recommended dose of a vitamin is 2.0 mg. Based on this information, a megadose of the vitamin would be ________ mg or more.

20.0

Which of the following statements is true?

A diet that has variety contains many different kinds of nutritious foods.

Which of the following statements is true?

An essential nutrient must be supplied by the diet

Which of the following groups of Americans is most at risk of undernutrition?

Chronic alcoholics

Which of the following statements is true?

Daily Values are dietary standards developed for food labeling purposes.

Which of the following structures normally prevents swallowed food from entering the larynx and trachea?

Epiglottis

Jamie wants to eat more foods that are naturally high in phytochemicals and fiber. Based on this information, which of the following foods would you recommend?

Fresh fruits and vegetables

Which of the following statements about fruits and vegetables is false?

Fruit juices provide more fiber than whole fruit.

Which of the following compounds is secreted by the human stomach?

Gastric juice

Which of the following foods is naturally a rich source of phytochemicals?

Grapes

Which of the following microbes is associated with the development of most stomach ulcers?

H. pylori

Which of the following statements is true?

In some regions of the United States, the traditional African-American diet may contain unhealthy amounts of fat and sodium.

Which of the following statements is true?

It is not unusual for similar studies, especially those involving human subjects, to have different findings.

________ is the sum of all chemical reactions that occur in living cells.

Metabolism

The amount of vitamin C that meets about 98% of the population's need for the nutrient is the ________ for the vitamin.

RDA

When following recipes, Candice wants to use fats that are not solid fats. Which of the following fats should she use?

Safflower oil

Which of the following behaviors is a known risk factor for heart disease?

Smoking cigarettes

________ includes farming techniques that do not deplete natural resources or harm the environment.

Sustainable agriculture

Kristan uses % DVs to help plan nutritious menus with various packaged foods. She should try to obtain at least 100% of the Daily Value for which of the following nutrients?

Vitamin C

Which of the following substances is a nutrient that does not supply any energy for the human body?

Vitamin D

Which of the following nutrients is the most essential for life?

Water

Derek takes protein supplements before and after his workouts. He told his workout partner that he became 200% stronger within a couple of months after he added the supplements to his diet. His report about the effects of the supplements is an example of a(an)

anecdote.

A substance that can protect a person's cells from being damaged or destroyed by certain harmful factors is a

antioxidant.

The ________ of a food describes the extent to which the body is able to absorb the nutrients from the food and use them.

bioavailability

A molecule forms when two or more atoms are attracted to each other and held together by

bonds.

A primary function of the digestive system is the

breakdown of food into nutrients.

Which of the following substances is a phytochemical?

caffeine

Generally, epidemiological studies

cannot determine cause-and-effect relationships.

Most forms of ________ are a source of energy for cells.

carbohydrate

The ________ is the smallest living functional unit in an organism.

cell

The Tolerable Upper Limit for a nutrient is the

highest average amount that is unlikely to harm most people when consumed daily.

Which of the following websites is most likely a source of biased and unreliable nutrition information?

dietsnomore4u.com

Scientists conduct a study in which 100 adults with chronic diarrhea are divided into 2 groups of 50 people. One group is given a supply of yogurt that contains a certain kind of bacteria and the other group is given yogurt that is bacteria free. The study's participants and researchers do not know which group of subjects has the bacteria in the yogurt and which group does not. The scientists instruct the participants to eat the entire 8 ounces of yogurt once a day for a month and record the their bowel habits. This is an example of a(n) ________ study.

double-blind

Chyme moves from the stomach into the

duodenum.

An ________ is an ion that can conduct electricity.

electrolyte

Iron, calcium, and carbon are

elements.

An ________ is a compound that speeds up (catalyzes) a chemical reaction

enzyme

Today, the only food Meghan ate was a casserole that contained 24 ounces of lemon-flavored yogurt, 16 ounces of cooked turkey, and 10 ounces of cooked noodles. According to MyPlate, she ate nothing from the food group that includes

fruit.

Libby was born without salivary glands. As a result of this condition, she

has trouble tasting food.

A(n) ________ is an atom or a group of atoms that has a positive or negative charge.

ion

After being absorbed, most lipids become incorporated into chylomicrons and enter

lacteals within the villi.

The ________ helps form feces by absorbing excess water and some minerals from chyme.

large intestine

An essential nutrient

must be supplied by the diet.

The brain and spinal cord are structures of the ________ system.

nervous

Researchers are conducting a study to determine the effects of vitamin C on the human immune system. The study involves providing pills that contain vitamin C to one group of human subjects and pills that do not contain vitamin C or other active ingredients to another group of people. The pills that do not contain the vitamin ar

placebos.

Over a 2-year period, a team of scientists records the eating behaviors and physical activity patterns of a group of healthy 8-year-old children to determine whether these factors are associated with weight gain. This study is an example of a(n) ________ study.

prospective

A person claims his newly invented device treats cancer without surgery, medication, or other forms of conventional medical therapy. However, people who have used the device report that it was not helpful, and it may have harmed them. According to this information, the inventor's claims and his device are

quackery.

Eating a high-salt diet increases people's chances of developing high blood pressure. Thus, a diet that supplies excessive amounts of salt is a ________ for high blood pressure

risk factor

In chemistry class, Karl combines hydrochloric acid with a base called sodium hydroxide. This chemical reaction results in the formation of a

salt.

Some food guides classify dried beans and peas with

seeds and nuts.

Chyme is the

semisolid liquid formed by the partial digestion of food in the stomach.

Phil is a participant in a study designed to examine the effects of taking a dietary supplement on muscle tissue development. Phil suspects he is in the experimental group, because he is certain his muscles are bigger and stronger as a result of taking the product supplied by the researchers. When the study is completed, Phil learns that he did not receive the dietary supplement. Phil thinks the researchers made a mistake—he is certain his muscle mass increased while he took the supplement. According to this information, Phil's belief that his physical condition improved while he participated in the study is an example of

the placebo effect.

The lining of the small intestine is covered with ________, tiny, finger-like structures that absorb nutrients from food.

villi