Many researchers believe that adults make choices about their intellectual development, quite separate from their culture and education

What is the name of the sheath that encases axons to protect them and increase the speed of communication between neurons?

a. neuronal sheath b. dendritic sheath c. synaptic sheath d. myelin sheath

An excess of glutamate has been linked to

a. tiredness and depression. b. Alzheimer's disease. c. autism and neuron death. d. multiple sclerosis.