The input from the eyes to the suprachiasmatic nucleus, responsible for shifting the phase of the circadian rhythm, originates from ____.
A) cones only
B) ganglion cells that are not connected to any cones or rods
C) cones and rods equally
D) rods only

Question

Quizplus · Accepted Answer

Ganglion cells that are not connected to any cones or rods, called intrinsically photosensitive retinal ganglion cells (ipRGCs), are responsible for transmitting light information from the eyes to the suprachiasmatic nucleus. These cells contain a photosensitive pigment called melanopsin and are sensitive to blue light. Cones and rods primarily mediate vision, but do not play a significant role in regulating the circadian rhythm.

The Input from the Eyes to the Suprachiasmatic Nucleus, Responsible