Question 1

Humans need vitamin B-6 for

Accepted Answer

Vitamin B-6 is necessary for the metabolism of amino acids, which are the building blocks of proteins. It helps to convert tryptophan to niacin (vitamin B-3) and serotonin, which is important for regulating mood and sleep. Additionally, vitamin B-6 is involved in the synthesis of hemoglobin, the protein in red blood cells that carries oxygen throughout the body.

Question 2

The classic signs and symptoms of pellagra include

Accepted Answer

Pellagra is a nutritional deficiency disease caused by inadequate intake of niacin (vitamin B3) and/or tryptophan. The classic signs and symptoms include dermatitis, especially in areas exposed to sunlight, such as the hands, neck, and face. Other symptoms may include diarrhea, dementia, and eventually death if left untreated. Heartburn, weak bones, and night blindness are not classic signs and symptoms of pellagra. Heartburn could be a symptom of acid reflux or gastroesophageal reflux disease (GERD). Weak bones could be a symptom of osteoporosis or another bone disease. Night blindness could be a symptom of vitamin A deficiency.

Question 3

Exposing milk to light can reduce its _____ content.

Accepted Answer

Exposing milk to light can reduce its riboflavin content. Riboflavin is a light-sensitive vitamin and can be degraded by exposure to light.

Question 4

Which of the following vitamins does not play a direct role in energy metabolism?

Accepted Answer

Vitamin A does not play a direct role in energy metabolism. However, it is essential for vision, immune function, and cell growth and development.

Question 5

Libby wants to have a birthday party for her 5-year old daughter and several of the child's friends.She plans to serve cake,ice cream,and milk to the children in the backyard on a warm sunny afternoon.To conserve vitamins in the milk,Libby should

Accepted Answer

The best option to conserve vitamins in the milk is to keep it in the refrigerator until it's time to serve it. This will help to maintain its nutritional value and prevent any potential bacterial growth that could occur if left out in the warm sun. Adding baking soda and chocolate syrup, heating it to boiling point, or pouring it into a clear container would not contribute to conserving the vitamins in the milk.

Question 6

The classic signs and symptoms of pellagra include

Accepted Answer

The classic signs and symptoms of pellagra include diarrhea, dermatitis, dementia, and eventually death if left untreated. Dry cough, edema, and night blindness are not typical symptoms of pellagra.

Question 7

The body needs folate to produce a coenzyme that

Accepted Answer

Folate is essential for the synthesis of DNA and RNA, which is necessary for cell division and growth. Folate is involved in the production of a coenzyme called tetrahydrofolate (THF), which helps to form the nucleotide building blocks of DNA. Without sufficient folate, the body may not be able to produce enough THF, which could lead to problems with DNA synthesis and cell division.

Question 8

Which of the following food groups includes foods that are good sources of riboflavin?

Accepted Answer

The dairy food group includes foods that are good sources of riboflavin, such as milk, cheese, and yogurt.

Question 9

Which of the following foods is a rich source of riboflavin?

Accepted Answer

Fat-free milk is a rich source of riboflavin, also known as vitamin B2. Fresh tomatoes, corn oil, and canned peaches do not contain significant amounts of riboflavin.

Question 10

The classic signs and symptoms of pellagra include

Accepted Answer

Pellagra is a nutritional deficiency disease caused by a lack of niacin and/or tryptophan in the diet. The classic symptoms of pellagra include dermatitis, diarrhea, and dementia. This combination of symptoms is sometimes referred to as the "three Ds" of pellagra. Other symptoms may include a red, swollen tongue, loss of appetite, and weakness. Heartburn, weak bones, and night blindness are not typically associated with pellagra.

Question 11

Becky's 2-year old son can't walk because he was born with spina bifida.To reduce the chances that her next baby is born with a neural tube defect,Becky should

Accepted Answer

Consuming green leafy vegetables, drinking orange juice, and taking a folic acid supplement before getting pregnant has been shown to reduce the risk of neural tube defects in babies. Fatty fish, vitamin A and D supplements, and pantothenic acid, B-6, and B-12 supplements are not directly linked to reducing the risk of neural tube defects. Iron, zinc, and magnesium are important for a healthy pregnancy, but do not specifically address the prevention of neural tube defects.

Question 12

Sean has carpal tunnel syndrome.A few months ago,he began taking megadoses of vitamin B-6,when he read that the vitamin can cure the disorder.Today,Sean reported to his friends that his hands were feeling numb and his walking is unsteady.Based on this information,Sean should

Accepted Answer

Sean should stop taking vitamin B-6 because he is showing signs and symptoms of vitamin B-6 toxicity. Megadoses of vitamin B-6 can lead to toxicity, which can cause numbness, tingling, and unsteadiness in the hands and feet. It is important to discontinue the intake of the vitamin to prevent further harm to his body.

Question 13

Ronald has an inherited metabolic defect in which his cells have difficulty processing homocysteine to methionine.His physician may recommend vitamin _____ supplements to help Ronald's body metabolize homocysteine.

Accepted Answer

Vitamin B-6 is involved in the metabolism of homocysteine to methionine, and supplements may help individuals with this metabolic defect.

Question 14

Erika takes megadoses of vitamin B-6 because she thinks it benefits her health.After learning about this vitamin in your nutrition class,which of the following statements about vitamin B-6 would be the most accurate information to tell her?

Accepted Answer

Ingesting large doses of vitamin B-6 can cause nerve damage. While vitamin B-6 is generally considered safe, taking megadoses can lead to toxicity and potentially serious health problems. It is important to follow the recommended dietary allowance (RDA) for vitamin B-6, which is 1.3-1.7 mg per day for most adults. Taking more than 100 mg per day can increase the risk of nerve damage and other adverse effects.

Question 15

Which of the following food groups includes foods that are good sources of riboflavin?

Accepted Answer

Grains are a good source of riboflavin. Some examples of grain foods that are high in riboflavin are fortified cereals, whole-grain bread, and brown rice.

Question 16

Green leafy vegetables and orange juice are rich sources of

Accepted Answer

Green leafy vegetables and orange juice are both rich sources of folate, also known as folic acid. Folate is essential for the production of new cells and DNA synthesis. It is particularly important during pregnancy to prevent birth defects in the developing fetus. Vitamin B-12 is primarily found in animal products such as meat, fish, and dairy, while iron is found in meat, fish, beans, and fortified cereals. Thiamin is found in whole grain breads, fortified cereals, and pork.

Question 17

Which of the following foods is a good source of thiamin?

Accepted Answer

Enriched bread is a good source of thiamin as it is commonly fortified with this B-vitamin. Whole milk, fresh spinach, and iceberg lettuce do not contain significant amounts of thiamin.

Question 18

Which of the following foods is a rich source of thiamin?

Accepted Answer

Wheat germ is a rich source of thiamin, also known as vitamin B1. Thiamin is important for energy metabolism and nerve function.

Question 19

Which of the following vitamins plays a direct role in energy metabolism?

Accepted Answer

Riboflavin, also known as vitamin B2, is a coenzyme involved in various metabolic pathways, including energy metabolism. It helps convert nutrients into energy and plays a vital role in the production of ATP, the primary energy source of the body. Vitamins A, C, and K are not directly involved in energy metabolism.

Question 20

Which of the following vitamins does not play a direct role in energy metabolism?

Accepted Answer

Folate does not play a direct role in energy metabolism. Thiamin, niacin, and riboflavin are all B vitamins that are essential in energy metabolism.

Quiz 8: Vitamins: Nutrients That Multitask

Humans need vitamin B-6 for

The classic signs and symptoms of pellagra include

Exposing milk to light can reduce its _____ content.

Which of the following vitamins does not play a direct role in energy metabolism?

Libby wants to have a birthday party for her 5-year old daughter and several of the child's friends.She plans to serve cake,ice cream,and milk to the children in the backyard on a warm sunny afternoon.To conserve vitamins in the milk,Libby should

The classic signs and symptoms of pellagra include

The body needs folate to produce a coenzyme that

Which of the following food groups includes foods that are good sources of riboflavin?

Which of the following foods is a rich source of riboflavin?

The classic signs and symptoms of pellagra include

Becky's 2-year old son can't walk because he was born with spina bifida.To reduce the chances that her next baby is born with a neural tube defect,Becky should

Sean has carpal tunnel syndrome.A few months ago,he began taking megadoses of vitamin B-6,when he read that the vitamin can cure the disorder.Today,Sean reported to his friends that his hands were feeling numb and his walking is unsteady.Based on this information,Sean should

Ronald has an inherited metabolic defect in which his cells have difficulty processing homocysteine to methionine.His physician may recommend vitamin _____ supplements to help Ronald's body metabolize homocysteine.

Erika takes megadoses of vitamin B-6 because she thinks it benefits her health.After learning about this vitamin in your nutrition class,which of the following statements about vitamin B-6 would be the most accurate information to tell her?

Which of the following food groups includes foods that are good sources of riboflavin?

Green leafy vegetables and orange juice are rich sources of

Which of the following foods is a good source of thiamin?

Which of the following foods is a rich source of thiamin?

Which of the following vitamins plays a direct role in energy metabolism?

Which of the following vitamins does not play a direct role in energy metabolism?