The "Ticking" of a Clock Cell Within the SCN Appears

Multiple Choice

The "ticking" of a clock cell within the SCN appears to involve

A) feedback loops of intracellular protein production.
B) the rhythmic opening of sodium channels in the membrane.
C) interactions between two adjacent clock cells.
D) the rhythmic opening of calcium channels in the membrane.
E) the buildup of sodium in the clock cell over time.