Q: Which of the following hormones is classified as fat soluble?  

Answer: C

Thyroid hormone is a type of hormone that is synthesized from tyrosine, an amino acid, and is classified as a fat-soluble hormone. Unlike water-soluble hormones such as amine, peptide, and protein hormones, which dissolve in water and are transported through the bloodstream, fat-soluble hormones are transported through the bloodstream bound to carrier proteins.
The lipid-soluble nature of thyroid hormones allows them to easily pass through the cell membrane and bind to intracellular receptors, which are located in the nucleus or cytoplasm of target cells. This binding activates the transcription of specific genes, leading to changes in cellular metabolism and growth.
In contrast, water-soluble hormones cannot pass through the cell membrane and therefore bind to receptors located on the cell surface. This binding triggers a series of intracellular signaling events that ultimately lead to changes in cellular function.

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