Which of the following statements are true regarding olfaction? Check all that apply. a)Smell is a chemical sense. b)Odorant molecules dissolve in mucus before stimulating a receptor. c)Humans can only distinguish up to 200 odors. d)Olfactory receptors have hairs on the apical surface that respond to stimuli. e)When olfactory receptors are stimulated a receptor potential is created.
