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(Solved): For questions 69, please refer to the diagram below in relation to the basal gang In this pathwa ...
For questions 6?9, please refer to the diagram below in relation to the basal gang In this pathway, G represents: O a. D1 receptors on substantia nigra pars compacta neurons O b. D1 receptors on medium spiny GABAergic neurons O c. D2 receptors on substantia nigra pars reticulata neurons O d. D2 receptors on medium spiny GABAergic neurons O e. None of the above QUESTION 8 For questions 6?9, refer to the diagram below in relation to the basal ganglia: Which one of these specific connections can be considered disinhibitory? O a. A?CO b. B?CO c. C?DO d. D?EO e. E?F? QUESTION 9 For questions 6?9, refer to the diagram below in relation to the basal ganglia: Which region represents the subthalamic nucleus? O a. AO b. B Oc. C O d. D O e. none of the above
1. Option B- D1 receptors on medium spiny GABAergic neurons.
The medium spiny GABAergic neurons in the striatum (caudate nucleus and putamen), a region of the basal ganglia, have D1 receptors. The control of voluntary motor movements depends on these neurons. Dopamine increases the activity of the medium spiny neurons when it binds to the D1 receptors. This increases the activity of the direct pathway (pathway A), which in turn facilitates movement.