EVERYDAY SCIENCE

Detailed explanation-1: -Stimuli are changes in the environment to which living organisms respond. External stimuli such as heat, light, touch, sound, smell, taste, water, and chemicals cause living organisms to respond. For example, if a man unintentionally touches a really hot object, he swiftly draws his hand away from it.

Detailed explanation-2: -A stimulus is a change in the environment (either external or internal) that is detected by a receptor. Receptors transform environmental stimuli into electrical nerve impulses. These impulses are then transmitted via neurons to the central nervous system where decision-making occurs.

Detailed explanation-3: -A stimulus is anything that can trigger a physical or behavioral change. The plural of stimulus is stimuli. Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.

Detailed explanation-4: -Stimuli are always converted into electrical signals via transduction. This electrical signal, or receptor potential, takes a specific pathway through the nervous system to initiate a systematic response.