2. Which natural chemicals released during exercise improve mood? a) Endorphins b)Adrenaline c) Dopamine d) Insulin

a) Endorphins, c) Dopamine, and b) Adrenaline<br /><br />While all three are released during exercise and can affect mood, endorphins are most directly associated with mood elevation and pain reduction. Dopamine contributes to feelings of pleasure and reward, and adrenaline contributes to the "high" often experienced after intense exercise. Insulin, while important for regulating blood sugar, is not directly linked to mood improvement in the same way.<br />