question_answer 47)

  Illustrate the differences between the mechanism of action of a protein and a steroid hormone.

Answer:

                Differences between the mechanism of action of a peptide and a steroid hormone are as follows  

Peptide Hormone Action	Steroid Hormone Action
Peptide hormones interact with membrane bound receptors. They generate second messengers (e.g. cyclic AMP, , ,etc.). The second messengers regulate cellular metabolism. e.g. oxytocin insulin, glucagon, vasopressin. etc,	They interact with intracellular receptors to form hormone receptor complex They regulate gene expression or chromosomes function by the interaction of hormone receptor complex with the genome. Cumulative biochemical actions results in physiological and development effects. e.g., cortisol, testosterone, estrogen and progesterone.