BIO271H1 Lecture Notes - Lecture 4: Hair Follicle, Tendon Reflex, Trpm5
Document Summary
Lecture 4 (february 3, 2016): sensory physiology: mechanoreception. Most sour food don"t release enough protons, but the proton is able to bind to and block a potassium channel and when it is block, it leads to depolarization and transduction. We can distinguish taste reception based on the mechanism. Ionotropic depolarization: movement of ions and charge across a membrane which would lead to a, salty and sour taste, signal is sent by second messenger. Ionotropic is a direct response and metabotropic is an indirect results. Taste has multiple pathways, but odor is a single pathway. Each taste receptor cell can express more than one taste receptor. Odorant neurons can bind to multiple odorants (combinatorial code) For insects, desiccation is a major issue receptor potential channel. Avoidance/sour sensillum, delivered a tastant, and measure signals. They found that each one of those sensory cells sent and action potential that had a specific amplitude, so they can be differentiated.
