After discovering that the shadows outside his window were only the trees in the yard, ralph's blood pressure decreased and his heartbeat slowed. these physical reactions were most directly regulated by his sympathetic nervous system. somatic nervous system. parasympathetic nervous system. sensory nervous system.

The sympathetic nervous system is what controls blood pressure and heart rate. It also stimulates and controls your "fight or flight" response.

if your boyfriend is cheating on you, my best advice to you is to dump him, he's only going to drag you down. and if you do, don't fret there's plenty better that know how to treat a person right. i mean honestly, the whole point of a romantic relationship is love, and if you love someone you aren't going to cheat on them. i do believe in second chances, but why would he cheat in the first place? i personally feel that if someone cheats, they ruin any chance they wanted/had with you. i wish you the best of luck with this, hang in there.

when comparing the cases, what similarities are there in the cases that suggest one person committed these murders?