Our physical abilities peak around the age of

The _______ ganglion cells project to the parvocellular layers of the LGN

Fill in the blank(s) with the appropriate word(s).

Based on his pioneering research on hunger, Walter Cannon concluded that

a. peripheral cues for hunger are secondary to central brain mechanisms. b. pressure stimulates the production of enzymes in the stomach. c. stomach cramps are responsible for hunger. d. stomach cramps are a necessary cue, but not a sufficient cue for hunger.