Multiple Choice
True or False: if false, choose the answer that best corrects the statement.
Steroid hormones are the only hormones that interact with the DNA via a receptor-hormone complex.
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16. The Endocrine System
Intracellular Receptors and Direct Gene Action
Multiple Choice
How do lipid-soluble hormones carry out their actions at their target cells?
A
They diffuse through the cell membrane and bind to intracellular receptors.
B
They bind to ion channels on the cell membrane, altering the cell's electrical state.
C
They bind to receptors on the cell surface and activate second messenger systems.
D
They are transported into the cell via endocytosis and then bind to nuclear receptors.
Verified step by step guidance1
Understand the nature of lipid-soluble hormones: These hormones, such as steroid hormones, are able to pass through the lipid bilayer of cell membranes due to their solubility in lipids.
Recognize the mechanism of action: Lipid-soluble hormones typically diffuse directly through the cell membrane without the need for a transport mechanism.
Identify the location of receptors: Once inside the cell, these hormones bind to intracellular receptors, often located in the cytoplasm or nucleus.
Explore the hormone-receptor interaction: The hormone-receptor complex then interacts with specific DNA sequences, influencing gene expression and altering cellular function.
Consider the effects: The changes in gene expression lead to the production of specific proteins that carry out the hormone's intended action within the target cell.
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