Question

1. why does the destruction of insulin producing cells in the pancreas prevent the body from maintaining normal blood sugar levels?

Explanation:

1. First, identify the function of insulin - producing cells: They make insulin, a hormone crucial for glucose regulation.
2. Then, explain insulin's function: It helps cells take in glucose and the liver store glucose as glycogen (lowering blood sugar) and also plays a role in releasing stored glucose (raising blood sugar when needed).
3. Finally, show the impact of cell destruction: Less insulin means cells can't take in glucose, liver can't store or release glucose properly, so blood sugar levels can't be normalized (either too high or can't be raised when low).

Answer:

Insulin - producing cells (beta cells in the pancreas) secrete insulin. Insulin's role is to facilitate the uptake of glucose from the blood into cells (like muscle and fat cells) and also to promote the conversion of glucose into glycogen for storage in the liver. When these cells are destroyed, insulin production drops significantly. Without sufficient insulin, cells can't take in glucose effectively, and the liver doesn't convert enough glucose to glycogen. As a result, glucose accumulates in the blood, leading to high blood sugar levels, and the body can't lower blood sugar to normal levels. Also, when blood sugar is low, without insulin - related mechanisms (and with insufficient insulin), the body has trouble releasing stored glucose from the liver (a process that is also regulated by insulin - related pathways) to raise blood sugar to normal, so overall normal blood sugar maintenance is disrupted.