On the Cellular Level, Sleep Occurs Because of

Multiple Choice

On the cellular level, sleep occurs because of

A) hyperpolarization of the cells of the thalamus and cortex.
B) depolarization of the cells of the thalamus and cortex.
C) increased synaptic input between axons and neurons in the thalamus and cortex.
D) desynchronization of electrical impulses in the cortex.
E) decreased opening of potassium and calcium channels in the membranes of cortical cells.