Which Is an Example of Provitamin A

question 38

Multiple Choice

Which is an example of provitamin A?

• A) retinoic acid
• B) retinol
• C) retinal
• D) tocopherol
• E) beta-carotene

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Definitions:

Phrenic Nerve

A nerve that originates in the neck and descends to the diaphragm, playing a crucial role in breathing by controlling the diaphragm's movements.

Hypoglossal

Pertaining to the twelfth cranial nerve, which controls the muscles of the tongue and is essential for swallowing and speech.

Tongue Muscle

Muscles within the tongue that allow for its movements necessary for speech, food manipulation, and swallowing.

Brachial Plexus

A network of nerve fibers, running from the spine, formed by the ventral rami of the lower four cervical nerves and the first thoracic nerve that supplies the arm and hand.