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The Entrainment of Circadian Rhythms by Visual Zeitgebers Is Mediated

Question 18

Multiple Choice

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

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