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

Detailed explanation-4: -Each sense receptor responds to different inputs (electromagnetic, mechanical, chemical), transmitting them as signals that travel along nerve cells to the brain. The signals are then processed in the brain, resulting in immediate behaviors or memories.

Detailed explanation-5: -An internal stimulus is based upon something that you feel such as hunger, thirst, love, or pain. It comes from within a person. In contrast, an external stimulus comes from outside a person.