What is the role of stimuli in the nervous system and how does it impact the body's response to external factors?

Stimuli play a crucial role in the nervous system by triggering sensory receptors to send signals to the brain. This process helps the body detect and respond to external factors such as temperature, pain, and light. The brain then interprets these signals and coordinates a response, which can include actions like moving away from danger or releasing hormones to regulate bodily functions. Overall, stimuli help the body adapt and survive in its environment.