Mode of Action Hormones

Question 1

Protein/Amine

Answer 1

1) Hormone is water soluble
2) Thus it binds to a specific receptor on the plasma membrane forming a hormone receptor complex
3) Activates release of secondary messengers cAMP (protein kinase cascade)
4) Alters enzyme activity by activating enzymes in the cell

Question 2

Steroid Hormone

Answer 2

1) Steroid Hormone is lipid soluble
2) Thus it diffuses through plasma membrane into cell
3) Hormone attaches to receptor in cytoplasm forming hormone receptor complex
4) Causes genes to be activated to produce a particular enzyme or protein, acts as a transcription factor changing rate of transcription or translation