In cell signaling, what is the term for the interaction in which one hormone enhances the effectiveness of another hormone, allowing it to achieve its full effect?

• A. Desensitization
• B. Antagonism
• C. Synergism
• D. Permissiveness

Answer: (C)

Verified step by step guidance

1. Step 1: Begin by understanding the key terms related to hormone interactions in cell signaling. These include 'Desensitization,' 'Antagonism,' 'Synergism,' and 'Permissiveness.' Each term describes a specific type of interaction between hormones.
2. Step 2: Define 'Desensitization.' This occurs when a cell reduces its response to a hormone over time, often due to prolonged exposure. It does not involve enhancing the effectiveness of another hormone.
3. Step 3: Define 'Antagonism.' This refers to a situation where one hormone counteracts or inhibits the effect of another hormone, rather than enhancing its effectiveness.
4. Step 4: Define 'Synergism.' This is the interaction where two or more hormones work together to produce a combined effect greater than the sum of their individual effects. However, this is not the term for enhancing the effectiveness of another hormone to achieve its full effect.
5. Step 5: Define 'Permissiveness.' This is the correct term for the interaction in which one hormone enhances the effectiveness of another hormone, allowing it to achieve its full effect. For example, thyroid hormones can increase the effectiveness of certain reproductive hormones.