Author Question: The entrainment of circadian rhythms by visual zeitgebers is mediated by A) part of the optic ... (Read 13 times)

mydiamond · **on:** Jun 22, 2018

The entrainment of circadian rhythms by visual zeitgebers is mediated by

A) part of the optic nerve.
B) the retinohypothalamic tract.
C) a rare type of retinal ganglion cell.
D) all of the above
E) both A and C

Question 2

The diurnal light-dark cycle entrains the sleep-wake cycle via the

A) REM-sleep circuits.
B) cortex.
C) retinohypothalamic tracts.
D) caudal brain stem.
E) reticular formation.