CAS PS 101 Lecture Notes - Lecture 11: Olfactory Receptor, Olfactory Bulb, Olfactory Nerve

• School: Boston University
• Department: Psychological & Brain Sciences
• Course: CAS PS 101
• Professor: Ira Wells

Document Summary

Calcium carbonate crystals rest upon the cilia and detect direction of gravity. Taste sweet, sour, bitter, salty, umami, fat(?) perceived by papillae and taste buds (neurons) Olfactory bulb, olfactory nerve axons lead to olfactory receptor cells. Sensuous scents male and female scents? pheromones: scents emitted by one sex of some hon-human animal species and detected by mice the other sex of the species: insects, pigs, Mothers and babies can identify each others smells not sure if pheromones inconclusive if humans use same system. Cutaneous senses (touch) touch is considered to be several independent sensations: pressure, warm/cold, vibration, lose sensation of pain, but can still touch) movement/stretch of skin, pain (you can. Mechanoreceptors: under epidermis, dermis there are sensory axons leading to mechanoreceptors. Pathways to touch: slow pathway-small diameter neurons carry localized, sharp, pricking, burning brief pain sensations, fast pathway-large diameter neurons carry touch sensations (pressure, stretching, vibrations)