Hormones mode of action Flashcards
1
Q
What are the 3 modes of hormone action?
A
- Pathways involving intracellular hormone receptors.
- Activation of specific intracellular proteins via secondary messages.
- Alteration of membrane transport mechanism.
2
Q
Provide a brief description of mechanism A (Pathways involving intracellular hormone receptors)
A
- Directly alter nuclear activity.
- To initiate or suppress biosynthesis of a specific protein.
3
Q
Provide a brief description of mechanism B (Activation of specific intracellular proteins via secondary messages)
A
- Involves cell membrane hormone receptors.
- Rather than intracellular hormone receptors.
4
Q
Provide a brief description of mechanism C and outline how it works (Alteration of membrane transport mechanis)
A
- Involves cell membrane hormone receptors to alter membrane permeability.
- After binding to a membrane receptor, hormones activate carrier molecules within the membrane.
- This increased the movement of substances from outside to inside the cell.
- Therefore affecting cell function.