THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Receptors for peptide hormones tend to be cell surface receptors built into the plasma membrane of cells and are thus referred to as trans membrane receptors.

Detailed explanation-2: -Receptors for peptide hormones tend to be found on the plasma membrane of cells, whereas receptors for lipid-soluble hormones are usually found within the cytoplasm. Upon hormone binding, the receptor can initiate multiple signaling pathways that ultimately lead to changes in the behavior of the target cells.