Describe what happens to insulin and glucagon secretions
duringfasting, and the resulting metabolic changes that occur at
thattime.

Explanation:

The blood glucose levels begins to low or drop in fasting condition, this leads to the decrease in secretion of insulin hormone. This further leads to the rise in glucagon secretion.

The glucagon is secreted by the α cells of the pancreas corresponding to the low blood sugar level. The liver is the target organ for glucagon. It stimulates the glycogen breakdown and inhibits the glycogen synthesis.  

The glucagon stimulates gluconeogenesis in the liver. The glucose formed by the hydrolysis of the glucose 6-phosphate is released from the liver. This process maintains the blood sugar levels in the fasting condition.