What is a 'Defined-Benefit Plan'. A defined-benefit plan is a retirement plan that an employer sponsors, where employee benefits are computed using a formula that considers factors, such as length of employment and salary history. The company administers portfolio management and investment risk for the plan.
The distinction between neuropeptide and peptide hormone has to do with the cell types that release and respond to the molecule; neuropeptides are secreted from neuronal cells (primarily neurons but also glia for some peptides) and signal to neighboring cells (primarily neurons).oth neuropeptides and peptide hormones are synthesized by the same sets of enzymes, which include prohormone convertases and carboxypeptidases that selectively cleave the peptide precursor at specific processing sites to generate the bioactive peptides.
T 3 is the most biologically active form of thyroid hormone and exerts its effects by binding to the thyroid hormone receptor (TR). TR is a member of the steroid hormone/thyroid hormone superfamily of nuclear receptors. There are two known TR genes, one encoding TRÎ± and the other encoding TRÎ².Synthesis of the thyroid hormones is controlled by the actions of the anterior pituitary hormone, thyroid stimulating hormone (TSH).ecause of its relatively lower potency, testosterone is sometimes considered to be a prohormone. Synthesis of the male sex hormones in Leydig cells of the testis. P450SSC, 3Î²-DH, and P450c17 are the same enzymes as those needed for adrenal steroid hormone synthesis.