ENDOCRINE SYSTEM - Hormone Actions & Interactions

Question 1

How do hormones act on target cells?

Answer 1

Alter membrane permeability.

Stimulate enzyme or protein synthesis.

Activate or deactivate enzymes.

Induce secretion.

Stimulate cell division (mitosis).

Question 2

What are the types of hormone interactions?

Answer 2

Synergists: Work together for the same effect (e.g., glucagon & epinephrine).

Antagonists: Oppose each other (e.g., insulin & glucagon).

Permissiveness: One hormone enhances another’s effect (e.g., thyroid & growth hormone).