This theory asserts that each human has a pre-established “ideal weight” that is resistant to change, despite acute changes in food intake or exercise.

The trichromatic receptor theory explains how different color receptors in the eye combine to produce color vision. However, this theory does NOT explain:

a. negative afterimages. b. how color receptors respond differently to different colors. c. how many color receptors the retina must utilize in order to produce color vision. d. color vision.

The first level of olfactory analysis of odor molecules is performed by neural circuits

located in the a. olfactory bulb. b. olfactory nerve. c. olfactory mucosa. d. nasal cavity. e. olfactory tract.