Which of the Following Is Used to Test the Activity

question 67

Multiple Choice

Which of the following is used to test the activity of the thyroid?

• A) (¹⁸O)
• B) (¹³¹I)
• C) (¹²³I)
• D) (²⁴Na)
• E) (⁹⁹Tc)

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Definitions:

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is absorbed by plants in photosynthesis.

Enzyme Specificity

The characteristic that allows an enzyme to choose only one substrate or a group of similar substrates, facilitating a specific chemical reaction.

Surface Tension

A physical property of liquids that causes the surface to behave as an elastic sheet, often observed as droplets forming shapes that minimize surface area.

Cohesion

The force that holds molecules of the same substance together (e.g., water molecules to each other).