Final answer:
Hormones are divided into lipid-derived (steroid and thyroid hormones) which are water insoluble and can diffuse across plasma membranes, and water soluble hormones like amino acid-derived (catecholamines) and peptide hormones that need receptors to enter cells.
Step-by-step explanation:
The question asked involves categorizing hormones based on chemical structure and properties into peptide hormones/catecholamines or steroid/thyroid hormones. In biology, hormones can be classified into three main groups: lipid-derived hormones, amino acid-derived hormones, and peptide hormones. Lipid-derived hormones, which include steroid hormones and thyroid hormones, are typically water insoluble and can diffuse across plasma membranes due to their lipophilic nature. On the other hand, peptide hormones, which are chains of amino acids, and catecholamines like epinephrine and norepinephrine, are generally water soluble and cannot easily cross cell membranes, necessitating specific receptors on the surface of target cells to exert their effects.