AP BIOLOGY

Detailed explanation-1: -An internal stimuli is the one which arises from within the body of the organism. The sensations of hunger, thirst and fear are examples of internal stimuli.

Detailed explanation-2: -Internal stimuli are factors located inside the body that are detected and cause a response. Examples of internal stimuli are oxygen levels, blood sugar and pH levels, water levels, and internal temperature. If any of these conditions are too high or too low, the body will respond in a way to get back to homeostasis.

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: -Smell, sound, etc., are examples of external stimuli and hunger, thirst, etc., are examples of internal stimuli.

Detailed explanation-5: -When sensory receptors in the nervous system detect stimuli, they send a message to the hypothalamus. The hypothalamus interprets the information and sends out a signal indicating how the body should respond to the stimuli. A particular response to a stimulus is often recognized by a certain behavior or action.