Endogenous opioids are described as contributing to pain relief and pleasure.

### Why this is right The material describes endogenous opioids as natural pain-relieving and pleasure-inducing chemicals. It also links them to feelings of euphoria and well-being. ### The concept Reward and pleasure involve more than one chemical signal. Dopamine is associated with pleasure and motivation and is released in response to rewarding stimuli. Endogenous opioids contribute to pain relief and pleasurable feelings, so their stated roles overlap in pleasure but are not identical. ### Terms - **Endogenous opioids**: Naturally produced chemicals that contribute to pain relief and pleasure. - **Dopamine**: A neurotransmitter associated with reward, pleasure, and motivation. - **Euphoria**: A strong feeling of well-being or pleasure. ### Remember Dopamine is emphasized for motivation and reward; endogenous opioids are also linked to pain relief and pleasure.