GENERAL HISTOLOGY

Detailed explanation-1: -Instead, a non-steroid hormone binds to a receptor on th e cell membr ane (see Figure below). The binding of the hormone triggers an enzyme inside the cell membrane. The enzyme activates another molecule, called the second messenger, which influences processes inside the cell.

Detailed explanation-2: -Nonsteroid hormones generally cannot pass through the cell membrane of their target cells. Nonsteroid hormones bind to receptors in a target cell and cause the release of secondary messengers that affect cell activities.

Detailed explanation-3: -A non-steroid hormone is made of amino acids. It is not fat soluble, so it cannot diffuse across the plasma membrane of a target cell. Instead, it binds to a receptor protein on the cell membrane.