BIO271H1 Lecture : The lecture where she decided to post ONLY pictures
Document Summary
Mechanoreceptors y two main types of mechreceptor proteins enac and trp channels y free nerve endings and merkel s disks-merkel s disks are free nerve endings associated with an enlarged epidermal cell. They have small receptive fields(what are they used for?). Slowly adapting tonic receptors most sensitive to indentation of the skin(slide 6) y root hair plexus- nerve endings that are wrapped around the base of a hair follicle: monitor movements across the body surface. Rapidly adapting phasic receptors; most sensitive to changes in movement(i. e a bug crawling on your skin) y slide 8- rapid adaptation by the pacinian corpuscle is a good example of mechanical filtering by accessory structures. The pc is a pressure and vibration receptor found deep in the skin, muscle, tendons, and joints. A sensory dendrite wrapped in layers of connective tissue. y with the corpuscle intact the neuron depolarized transiently at the onset and offset of the stimulus.
