The ________ contains the primary biological clock that controls sleep-wake cycles in the rat.
A) intergeniculate leaflet
B) pineal gland
C) suprachiasmatic nucleus
D) pretectal area
E) superior colliculus
Question 2
The suprachiasmatic nucleus controls circadian rhythms via
A) indirect neural connections with the hippocampus.
B) release of hormones from the pituitary.
C) activation of the ganglion cells of the retina.
D) secretion of as yet unidentified chemicals.
E) pathways routed through the paraventricular hypothalamus.