Final answer:
The endocrine system communicates with the nervous system to regulate hunger and satiety, with the correct pairing being Digestive and Nervous systems.
Step-by-step explanation:
The endocrine system sends messages to the nervous system to make you feel hungry, then hormones tell your brain to make you feel full. The correct answer is thus 1) Digestive, Nervous.
When you feel hungry, it is because your brain, which is the control center for the sensation of hunger and satiety, receives signals from the body indicating that it is time to eat. This signal triggers the nervous system to stimulate the feeling of hunger. The endocrine system then controls the release of hormones and enzymes necessary for the digestion of food after you begin eating. Once your body has had enough food, different hormones are released that signal the brain to make you feel satiated or full.
It is important to understand that multiple organ systems, including the nervous system, digestive system, cardiovascular system, and muscular system, work together to ensure the proper digestion of food. In response to food intake, your body will increase heart rate and dilate blood vessels in the digestive organs to aid digestion, demonstrating the interconnectivity of these systems.