GENERAL HISTOLOGY

Detailed explanation-1: -A steroid hormone directly initiates the production of proteins within a target cell. Steroid hormones easily diffuse through the cell membrane.

Detailed explanation-2: -Lipid-soluble hormones easily diffuse through the cell membrane. Steroid hormones are the most common circulating lipid-soluble hormones. Steroid hormones include: testosterone, estrogens, progesterone, aldosterone and cortisol.

Detailed explanation-3: -Amino acid-derived hormones and protein hormones are water-soluble and insoluble in lipids.

Detailed explanation-4: -Lipid-derived (soluble) hormones can enter the cell by diffusing across the plasma membrane and binding to DNA to regulate gene transcription and to change the cell’s activities by inducing production of proteins that affect, in general, the long-term structure and function of the cell.

Detailed explanation-5: -Lipid-derived hormones are lipid-soluble and can diffuse across cell membranes because they are non-polar. Most lipid hormones are derived from cholesterol; examples include steroids such as estrogen and testosterone.