The hormone insulin influences appetite by

A) altering the sensitivity of the taste buds.
B) regulating how much glucose enters the cells.
C) controlling the rhythm of stomach contractions.
D) stimulating activity by the skeletal muscles.

Insulin regulates how much glucose enters the cells, which is important for providing energy to the body. When insulin levels are high, glucose levels in the blood decrease, which can lead to feelings of hunger and increased appetite as the body signals for more glucose to be consumed. Therefore, insulin plays a role in appetite regulation by affecting glucose levels in the body. The other options listed are not related to insulin's influence on appetite.