All of the Following Statements Concerning Vitamin a Are Correct

question 33

Multiple Choice

All of the following statements concerning vitamin A are correct EXCEPT

• A) in humans, retinol, retinal and retinoic acid are completely interconvertible
• B) the intestinal mucosa can convert beta-carotene to retinol
• C) retinol is transported by a specific plasma protein
• D) a cis isomer of retinal is involved in the visual process
• E) the liver is the main storage site for retinol and retinol esters

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Definitions:

Retinal Detachment

A serious condition where the retina at the back of the eye pulls away from its normal position.

Retina

The Retina is the light-sensitive layer at the back of the eye that converts light into neural signals for visual recognition by the brain.

Diabetic Retinopathy

An eye condition that affects individuals with diabetes, characterized by damage to the blood vessels of the retina.

Retinal Detachment

A medical condition where the retina separates from the back of the eye, potentially leading to vision loss if not treated promptly.