Across

1 Space between neurons

3 Copy genetic material to produce an identical cell

5 Opiates come from this plant

6 Feeling of euphoria

9 Controls breathing and heart rate

10 Pleasure neurotransmitter

11 Pain relief

Down

1 Opiates act on the _________ cord and brain

2 Pain reliever produced by brain

4 An opiate receptor

6 Another name for pleasure

7 Ventral _________ area

8 Powerful opiate