The Trophic Hormone That Controls the Release of T4 (Thyroxine)

question 9

Multiple Choice

The trophic hormone that controls the release of T4 (thyroxine) and T3 (triiodothyronine) is secreted by

• A) Acidophilic cells
• B) Basophilic cells
• C) Chromaffin cells
• D) Chromophobic cells
• E) Follicular cells

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Definitions:

Nuclear Receptor Model

A framework for understanding how certain receptor proteins within cell nuclei mediate the effects of lipophilic hormones, vitamins, and other ligands.

Receptor Molecule

A protein on the surface of a cell that binds to specific molecules, triggering a response in the cell.

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Nuclear Receptor Model

A conceptual framework explaining how specific receptors within cell nuclei regulate gene expression in response to hormones and other molecules.