[Campbell Biology P.1152] According to Figure 49.24, which of the following statements accura... | Practice Question

According to Figure 49.24, which of the following statements accurately describes how a specific addictive drug affects the brain's reward system?

  • A: Opioids directly stimulate dopamine-releasing VTA neurons.
  • B: Nicotine blocks the removal of dopamine from the synaptic cleft.
  • C: Cocaine and amphetamines stimulate the reward system response by blocking dopamine reuptake.
  • D: All addictive drugs decrease the activity of dopamine-releasing VTA neurons.

Explanation

Figure 49.24 illustrates that 'Cocaine and amphetamines block removal of dopamine from synaptic cleft,' which effectively increases the concentration of dopamine in the synapse, thereby enhancing the reward system response. Addictive drugs generally enhance the activity of the dopamine pathway.