Vitamins A, E, and K Quiz

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Questions and Answers

What is the main action of Vitamin E as an antioxidant?

Facilitates the conversion of tocopherols to tocotrienols

Helps in the synthesis of red blood cells

Promotes the absorption of Vitamin K

Stops the chain reaction of free radicals (correct)

Which form of Vitamin E is most active in the body?

Gamma-tocopherol

Delta-tocopherol

Beta-tocopherol

Alpha-tocopherol (correct)

What is a classic sign of Vitamin E deficiency?

Increased production of free radicals

Decreased absorption of lipids

Erythrocyte hemolysis (correct)

Poor blood clotting

At what dosage has Vitamin E toxicity been observed?

300 mg/d Signup and view all the answers

Which food sources are rich in Vitamin E?

Polyunsaturated plant oils and nuts Signup and view all the answers

What are the three different forms of vitamin A that are active in the body?

Retinol, retinal, retinoic acid Signup and view all the answers

Which foods are a source of beta-carotene?

Pumpkin and deep orange fruits Signup and view all the answers

What is the UL for vitamin A intake per day?

3000 microgram/d Signup and view all the answers

What deficiency can result from a lack of vitamin A?

Blindness Signup and view all the answers

What is the primary action of vitamin K in the body?

Blood clotting Signup and view all the answers

Which vitamin A sources contribute to daily retinol activity equivalent (RAE) recommendations?

Dairy and meat Signup and view all the answers

How is the vitamin A content of foods expressed in recommendations?

Retinol activity equivalent (RAE) Signup and view all the answers

What can result from vitamin A toxicity?

Bone and birth defects Signup and view all the answers

What is the primary plant-derived form of Vitamin K?

Phylloquinone Signup and view all the answers

What is the recommended daily allowance of Vitamin K for men?

120 microgram/d Signup and view all the answers

Which condition is associated with Vitamin K deficiency in newborns?

Hemorrhagic disease Signup and view all the answers

What is a characteristic of Vitamin K toxicity?

Not commonly reported Signup and view all the answers

Which of these foods is a rich source of Vitamin D?

Salmon Signup and view all the answers

What deficiency condition in adults is associated with a lack of Vitamin D?

Osteomalacia Signup and view all the answers

What is the primary role of 1,25-diOH-D3 in the body?

Maintain adequate plasma levels of calcium Signup and view all the answers

What can result from high doses of Vitamin D over time?

Hypercalcemia Signup and view all the answers

Study Notes

Vitamin E

Vitamin E's primary antioxidant action is to protect cell membranes from damage caused by free radicals.
The most active form of vitamin E in the body is alpha-tocopherol.
A classic sign of Vitamin E deficiency is nerve damage.
Vitamin E toxicity has been observed at dosages exceeding 1,000 IU daily.
Rich sources of Vitamin E include vegetable oils, nuts, seeds, and leafy green vegetables.

Vitamin A

The three active forms of vitamin A in the body are retinol, retinal, and retinoic acid.
Beta-carotene is a precursor to vitamin A and is found in orange and yellow fruits and vegetables, such as carrots, sweet potatoes, and cantaloupe.
The Upper Limit (UL) for vitamin A intake per day is 10,000 IU for adults.
A lack of vitamin A can result in night blindness.
Vitamin A sources that contribute to daily retinol activity equivalent (RAE) recommendations are retinol (preformed vitamin A), beta-carotene, and other provitamin A carotenoids.
The vitamin A content of foods is expressed in recommendations as retinol activity equivalents (RAE).
Vitamin A toxicity can result in birth defects, and bone abnormalities.

Vitamin K

The primary action of vitamin K in the body is to help the body clot blood.
The primary plant-derived form of Vitamin K is phylloquinone.
The recommended daily allowance of Vitamin K for men is 120 mcg.
A condition associated with Vitamin K deficiency in newborns is hemorrhagic disease (also known as Vitamin K deficiency bleeding).
A rich source of Vitamin D includes fatty fish, such as salmon, tuna, and mackerel.

Vitamin D

A deficiency condition in adults associated with a lack of Vitamin D is rickets, a condition characterized by bone softening and weakening, and osteomalacia, a condition that affects adults and involves bone softening.
The primary role of 1,25-diOH-D3 (the active form of Vitamin D) in the body is to regulate calcium and phosphorus levels, which are crucial for bone health.
High doses of Vitamin D over time can result in hypercalcemia (high blood calcium levels), a condition that can lead to kidney stones and other health problems.

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Description

Test your knowledge on the essential vitamins A, E, and K. This quiz covers their functions, sources, deficiencies, and toxicity levels. Perfect for students and health enthusiasts looking to deepen their understanding of these vital nutrients.