Final answer:
The statement is true; cell-surface receptor proteins convert extracellular ligand-binding events into intracellular signals, affecting the target cell's behavior via signal transduction.
Step-by-step explanation:
The statement that cell-surface receptor proteins act as signal transducers by converting an extracellular ligand-binding event into intracellular signals that alter the behavior of the target cells is true. Cell-surface receptors, also known as transmembrane receptors, are integral to the plasma membrane and bind to external signaling molecules called ligands. These receptors are responsible for signal transduction, which allows an extracellular signal to be converted into an intracellular signal. Ligands that interact with cell-surface receptors do not need to enter the cells they affect. Instead, they cause a conformational change in the receptor that triggers a cascade of intracellular events, leading to various cellular responses.
The assertion that cell-surface receptor proteins function as signal transducers, converting extracellular ligand-binding events into intracellular signals that modify target cell behavior, is accurate. These transmembrane receptors, situated within the plasma membrane, engage with external signaling molecules known as ligands. Playing a pivotal role in signal transduction, these receptors facilitate the conversion of extracellular signals into intracellular responses. Notably, ligands interacting with cell-surface receptors don't necessarily need to enter the target cells. Instead, they induce a conformational change in the receptor, initiating a cascade of intracellular events. This cascade then triggers diverse cellular responses, illustrating the critical role of cell-surface receptors in mediating communication between the extracellular environment and the intracellular milieu. The specificity and efficiency of this process highlight the significance of cell-surface receptors in orchestrating cellular behaviors in response to external cues.