Final answer:
Blood sugar levels are monitored by the pancreas, which releases insulin and glucagon to regulate glucose levels in the blood, thereby affecting hunger signals. So the correct answer is option (A).
Step-by-step explanation:
Blood sugar levels are monitored by the pancreas, which triggers hormonal responses to make you more or less hungry. The correct answer to the question is (a) pancreas. After a meal, when blood glucose levels increase, the beta cells in the pancreas release insulin into the bloodstream.
This facilitates the uptake of glucose by muscles and fatty tissues, where it is converted into glycogen, especially within the liver, leading to a reduction in blood glucose levels. Conversely, when blood glucose levels dip too low, the pancreas secretes glucagon, which prompts glycogen breakdown in the liver to release glucose back into the bloodstream. These functions of the pancreas help maintain the body's normal blood glucose levels, which is crucial in managing hunger and overall energy balance.