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Fat-Soluble Vitamins: Vitamin A Functions

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Fat-Soluble Vitamins: Vitamin A Functions

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Questions and Answers

What role does Vitamin A play in vision, specifically in low light conditions?

Vitamin A is needed to form visual purple, a pigment in the retina that enables dim light vision.

Identify two essential functions of Vitamin A related to immune health.

Vitamin A strengthens the body's immunity against infections and is required for the production and activity of white blood cells.

Explain how Vitamin D contributes to bone health.

Vitamin D ensures the absorption of calcium, allowing calcium to be deposited into bones for mineralisation.

What are the consequences of a deficiency in Vitamin A regarding cell protection?

<p>A deficiency in Vitamin A can reduce the body's ability to act as an antioxidant, leaving cells vulnerable to damage by free radicals.</p> Signup and view all the answers

List two animal sources and two plant sources of Vitamin D.

<p>Animal sources include egg yolk and liver; plant sources include fortified breakfast cereals and shiitake mushrooms.</p> Signup and view all the answers

Study Notes

Vitamin A

Vital for forming visual purple, a pigment essential for night vision in the retina.
Critical for producing and maintaining the protective tissue lining of body organs.
Enhances immune function by aiding in white blood cell production and activity.
Functions as an antioxidant, shielding body cells from damage by free radicals, which may lead to diseases like cancer and heart disease.

Good Sources of Vitamin A

Plant sources:
- Carrots
- Papayas
- Spinach
- Sweet potato leaves
Animal sources:
- Cheddar cheese
- Egg yolk
- Liver

Vitamin D

Facilitates calcium absorption, crucial for proper bone mineralization and health.

Good Sources of Vitamin D

Produced by the skin through sunlight exposure; just 5 minutes of exposure to arms and legs twice a week can generate sufficient levels.
Plant sources:
- Fortified breakfast cereals
- Shiitake mushrooms
Animal sources:
- Egg yolk
- Liver
- Sardines (with edible bones)
- Tuna

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Description

Explore the vital functions of Vitamin A in this quiz. Learn how it contributes to vision, tissue protection, immune system strength, and antioxidant activity. Test your knowledge about this essential fat-soluble vitamin!