Describe the Mechanism of Action of Thyroid Hormones

question 106

Multiple Choice

Describe the mechanism of action of thyroid hormones.

• A) These hormones interact with membrane signaling proteins.
• B) Thyroid hormones bind to molecules of the cytoskeleton in the cell cytoplasm.
• C) Thyroid hormones bind to epithelial cell membranes that line the intestine.
• D) These hormones bind to molecules of the cytoskeleton in the cell cytoplasm.

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Definitions:

Proximal Convoluted Tubule

The portion of the nephron in the kidney which is involved in the reabsorption of water, ions, and all organic nutrients.

Cotransported

Refers to the simultaneous transport of two substances across a cell membrane by a single carrier protein, often using the gradient of one solute to drive the transport of the other.

Glomerular Filtration Rate

A measurement of how much blood is filtered by the glomeruli of the kidney each minute, indicating kidney function.

Renal Fraction

Portion of the cardiac output that flows through the kidneys; averages 21%.