Types of Hormones

Question 1

Steroid Hormones

Answer 1

• composed of lipids (fats)
• pass through target cell membrane which is made of fat
• attached to a receptor in the cell cytoplasm
• the hormone-receptor complex enters the nucleus
• hormone-receptor complex activates a gene
• activated gene controls the reaction needed in the cell-

Question 2

Protein Hormones

Answer 2

-are not fat soluble
-work by a Second Messenger Hypotheses
-protein hormone (1st messenger) binds to receptor on
target cell surface
-hormone-receptor complex activates an enzyme
-enzyme converts ATP to cyclic AMP (cAMP) – the 2nd
messenger
-cAMP triggers a series of desired reactions in the cell