AP PSYCHOLOGY

Detailed explanation-1: -So, the correct answer is ‘Internal stimulus’.

Detailed explanation-2: -We all know hunger is the desire to eat, but did you know there are two forms – internal and external? Internal hunger is triggered inside your body, whereas external hunger is triggered by environmental factors, such as the aroma of food, or an emotion.

Detailed explanation-3: -Stimulus is of two types, external and internal. Smell, sound, etc., are examples of external stimuli and hunger, thirst, etc., are examples of internal stimuli.

Detailed explanation-4: -Hunger is physiological. It occurs because of biological changes throughout the body, which signal that you need to eat to maintain energy levels. Appetite is simply the desire to eat. It can be a result of hunger, but often has other causes, such as emotional or environmental conditions.

Detailed explanation-5: -The physical sensation of hunger is related to contractions of the stomach muscles. These contractions-sometimes called hunger pangs once they become severe-are believed to be triggered by high concentrations of the ghrelin hormone.