What Is the Daily Tolerable Upper Intake Level (UL) for Fluoride

question 29

Multiple Choice

What is the daily Tolerable Upper Intake Level (UL) for fluoride for people eight years of age and over?

• A)2.5 milligrams
• B)5.0 milligrams
• C)7.5 milligrams
• D)10.0 milligrams

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Definitions:

Photorespiration

A process in plant metabolism where the enzyme RuBisCO oxygenates RuBP, leading to a decrease in photosynthetic efficiency and carbon fixation.

Stomata

Small openings found on the underside of plant leaves that enable gas exchange and transpiration.

Cellular Respiration

A metabolic process in cells where nutrients are converted into energy in the form of ATP, using oxygen and releasing carbon dioxide.

Photosynthesis

The process by which green plants, algae, and certain bacteria transform light energy into chemical energy, producing oxygen and glucose from carbon dioxide and water.