Thyroid Hormone Contains the Element

question 44

Multiple Choice

Thyroid hormone contains the element

• A)fluorine.
• B)chlorine.
• C)iron.
• D)iodine.
• E)zinc.

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Definitions:

Oil-immersion Lens

A type of microscope objective lens used with a drop of oil to increase resolution by reducing light refraction.

Coarse Focus Knob

A control on a microscope that allows the user to make large adjustments in focus, moving the objective lens closer to or further from the specimen.

Lens-cleaning Solution

A specially formulated liquid used for cleaning and disinfecting optical lenses, including those in eyeglasses and cameras.

Brownian Movement

The random motion of particles suspended in a fluid, resulting from their collision with the quick atoms or molecules in the gas or liquid.