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katrin2010 [14]
3 years ago
5

How do you call the chemical substances that have a calming effect?

Biology
1 answer:
Alinara [238K]3 years ago
8 0
A depressant is the chemical substances that have a calming effect on people. They are also called sedatives or tranquilizers. The correct answer is 2. 
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I hope it's help u

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3 years ago
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