BPK 105 Chapter Notes - Chapter 9: Lacrimal Canaliculi, Lamellar Corpuscle, Lacrimal Sac

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 105
• Professor: Ryan Dill

Document Summary

Bpk 105 fundamentals of human structure and. Objectives: sensation: process initiated by stimulating sensory receptors; conscious perception. Steps to sensation: sensory receptors respond to environmental stimuli, nerve impulses travel to the cerebral cortex, sensation of stimuli occurs. 4: sensory adaptation, decreases in stimulus response, can occur with repetitive. Thermoreceptors: temperature changes: sensory receptors: dendrites of neurons specialized to detect certain types of stimuli, general senses. Divided into 2 groups: somatic senses: body and its environment, visceral senses: internal organs, involving pain and pressure. Free nerve endings: responds to painful stimuli, temperature, itch, or movement. Receptors for temperature are either cold receptors or warm receptors. Localized, sharp, pricking, or cutting pain resulting from rapidly conducted action potentials. Diffuse, burning, or aching pain resulting from action potentials that are propagated more slowly. Reduced or controlled by gating mechanisms : gate control theory: action potentials close the gate and inhibit action potentials carried to the brain by the spinothalamic tract.