Silver and Colleagues (1996) Conducted Transplant Experiments in Which Hamster

Silver and colleagues (1996) conducted transplant experiments in which hamster donor SCN tissue was enclosed within a capsule before being transplanted into a host hamster whose clocks ran at different rates.

A) The capsule allowed neural processes to grow, but did not allow nutrients and diffusible molecules to flow between the host and graft tissue.
B) The destruction of the SCN in the host animal prior to transplant made it highly rhythmic.
C) The encapsulated grafts restored the activity rhythm in the host, with the period length characteristic of the donor SCN.
D) The study demonstrated that the animals' activity rhythms are caused by the SCN sending signals over neural pathways.