Which statement about intracellular mediated responses is correct?

Which statement about intracellular mediated responses is correct?

• A. Receptors are always in the cell membrane
• B. They are only activated by hydrophilic ligands
• C. Responses are mediated by gene regulation
• D. Responses are immediate and short-lived

Answer: (C)

Intracellular mediated responses are primarily linked to the regulation of gene expression inside the cell. When a ligand—often a hydrophobic molecule—binds to its receptor, which is typically located within the cytoplasm or nucleus rather than the cell membrane, it can activate signaling pathways that lead to alterations in gene transcription. This means that the effects of these responses can result in the synthesis of specific proteins, which in turn can effect longer-lasting changes in cellular function and activity. In contrast to immediate signaling responses, intracellular mediated responses generally take longer to manifest, as they involve the complex process of transcription and translation. The resulting biological effects can be sustained over a more extended period, depending on how the cellular processes are regulated. Thus, the correct answer highlights the significance of gene regulation in these intracellular mediated responses, which distinguishes them from other types of signaling mechanisms that may generate faster, more short-term effects.

Intracellular mediated responses are primarily linked to the regulation of gene expression inside the cell. When a ligand—often a hydrophobic molecule—binds to its receptor, which is typically located within the cytoplasm or nucleus rather than the cell membrane, it can activate signaling pathways that lead to alterations in gene transcription. This means that the effects of these responses can result in the synthesis of specific proteins, which in turn can effect longer-lasting changes in cellular function and activity.

In contrast to immediate signaling responses, intracellular mediated responses generally take longer to manifest, as they involve the complex process of transcription and translation. The resulting biological effects can be sustained over a more extended period, depending on how the cellular processes are regulated. Thus, the correct answer highlights the significance of gene regulation in these intracellular mediated responses, which distinguishes them from other types of signaling mechanisms that may generate faster, more short-term effects.