BIO202H5 Lecture Notes - Lecture 8: Olfactory Bulb, Semicircular Canals, Eustachian Tube
Document Summary
Most nerves are contained in a bundle in the pns. The neurons can be connected depending on the necessity. Odorants bind to odorant receptor neurons (bipolar neurons) in olfactory epithelium of the mammalian nasal cavity. The binding results in activation of neuron (action potential signal) The signal is sent to the olfactory bulb. One of the cranial nerves in olfactory bulb takes that signal to the temporal lobe. Has receptors on the dendrites of the neuron. Taste buds of terrestrial vertebrates exist on tongue, soft palate, larynx, esophagus. Taste buds are specialized taste receptors cells. The taste cells are connected to nerve endings that will get excited depending on the taste. Can be on the external surfaces of body. Their vibration generates sounds waves that allow us to hear. The fluid within these two move or flow which disturbs the hair cells in the membrane. The movement of hair cells creates a signal that is travelled to the brian.
