What is the basic function of real receptors?

What is the basic function of real receptors?

• A. To sense the presence of endogenous ligands and initiate the appropriate response; function as signal transducers.
• B. To metabolize drugs.
• C. To transport molecules across membranes.
• D. To store lipids.

Answer: (A)

Receptors act as the cell’s sensing and response devices. They specifically bind endogenous signaling molecules such as hormones or neurotransmitters, and that binding triggers a conformational change that starts a signal transduction cascade inside the cell. This is what leads to an appropriate cellular response, turning external chemical signals into coordinated internal activity. They aren’t enzymes that metabolize drugs, nor transport proteins that move substances across membranes, and they aren’t lipid storage proteins. Drugs can interact with these receptors by mimicking or blocking natural ligands, thereby modulating the signaling that follows binding.

Receptors act as the cell’s sensing and response devices. They specifically bind endogenous signaling molecules such as hormones or neurotransmitters, and that binding triggers a conformational change that starts a signal transduction cascade inside the cell. This is what leads to an appropriate cellular response, turning external chemical signals into coordinated internal activity. They aren’t enzymes that metabolize drugs, nor transport proteins that move substances across membranes, and they aren’t lipid storage proteins. Drugs can interact with these receptors by mimicking or blocking natural ligands, thereby modulating the signaling that follows binding.