Most drugs of abuse flood the circuits of the reward center in the brain with ; some drugs also reduce the level of after long term use and causes .

feeling of pleasure, dopamine, tolerance

Explanation:

Drugs of abuse causes the brain to produce neurotransmitters called dopamine, this neurotransmitter produces a sense of pleasure. The constant intake of drugs increases the tolerance of drug and the body requires more dose so as to experience the desired effect. Drug abuser may need more amount of drug than before to experience the same level of dopamine to get high.

texas governor sam houston opposed secession, but was unable to prevent it. in this speech, given prior to lincoln's election, he presents the argument that slavery would be safer within the united states than outside of it. it was a prescient argument, and one held by several other southern leaders.

have a good day pls vote me brailyest