__________ units refer to the 46 unique movements involved in the facial expressions that indicate emotions

As soon as Rashidat catches a whiff of the cologne of the woman sitting in front of him in class, he is attracted to her. Though she is a complete stranger, her smell is familiar. He is unable to place the smell, but it brings back good memories. Why??

a. ?Rashidat was downwind from the woman's pheromones. b. ?Connections from the olfactory bulb are plentiful in the amygdala. c. ?Rashidat's vomeronasal system was activated. d. ?The woman's odor type was the same as his.

The idea that the eye contains three kinds of photoreceptors differentially sensitive to red, green, and blue that are responsible for color vision was proposed by the German physiologist

a. Gustav Fechner. c. Ernest Heinrich Weber. b. Ewald Hering. d. Hermann von Helmholtz.