the action of one agent on another that evokes activity in the receiving structure or agent

the action of one agent on another that evokes activity in the receiving structure or agent

• A. Stimulus
• B. Response
• C. Signal
• D. Receptor

Answer: (A)

Stimulus is something that elicits activity in the receiving tissue or system. In therapeutic contexts, a stimulus can be tactile touch, a temperature change, an electrical current, or a chemical cue—that triggering event prompts the receiving structure to become active, such as nerve firing or a muscle response. The important distinction is that the stimulus is the cause of the activity, while the resulting activity is the response. A signal, by contrast, is the information that might be transmitted or conveyed, not necessarily the direct event that makes the receiving system start to respond. A receptor is the structure that detects the stimulus, not the event that causes the activation. So the action of one agent on another that evokes activity in the receiving structure is best described as a stimulus.

Stimulus is something that elicits activity in the receiving tissue or system. In therapeutic contexts, a stimulus can be tactile touch, a temperature change, an electrical current, or a chemical cue—that triggering event prompts the receiving structure to become active, such as nerve firing or a muscle response. The important distinction is that the stimulus is the cause of the activity, while the resulting activity is the response. A signal, by contrast, is the information that might be transmitted or conveyed, not necessarily the direct event that makes the receiving system start to respond. A receptor is the structure that detects the stimulus, not the event that causes the activation. So the action of one agent on another that evokes activity in the receiving structure is best described as a stimulus.