Steroid hormones are based on _____ and are described as lipophilic.
Answer
cholesterol
Explanation
The slides state that steroid hormones are based on **cholesterol** and are lipophilic. These properties distinguish them from peptide/protein hormones and help organize the structural classification presented in the lecture.\n\n**Key takeaway:** Cholesterol is the stated precursor basis for steroid hormones.\n\n**Glossary:** **Cholesterol**: A lipid molecule that serves as the basis for steroid hormones; **lipophilic**: Having an affinity for lipid environments.