**Core Concept**
Steroid hormones, such as cortisol and aldosterone, are lipid-soluble and can diffuse through the cell membrane to bind with intracellular receptors. In contrast, peptide hormones, such as insulin and epinephrine, have receptors on the cell surface.

**Why the Correct Answer is Right**
Steroid hormones, like cortisol and aldosterone, have a lipophilic nature that allows them to easily pass through the cell membrane. They then bind to specific intracellular receptors, which activate gene transcription and influence various cellular processes. This mechanism is distinct from peptide hormones, which have receptors on the cell surface and activate second messenger systems or ion channels upon binding.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect, as steroid hormones like cortisol and aldosterone indeed have intracellular receptors.
**Option B:** Incorrect, as insulin has a transmembrane receptor on the cell surface, which activates a tyrosine kinase signaling cascade.
**Option C:** Incorrect, as epinephrine (adrenaline) has beta-adrenergic receptors on the cell surface, which activate G-protein coupled signaling pathways.

**Clinical Pearl / High-Yield Fact**
Steroid hormones can be classified into two main groups: glucocorticoids (e.g., cortisol) and mineralocorticoids (e.g., aldosterone), which have distinct effects on metabolism and electrolyte balance. Understanding the mechanisms of action for these hormones is crucial in managing endocrine disorders.

**Correct Answer:** A. Steroid hormones.