BIOL 205 Lecture Notes - Lecture 23: Macula Of Retina, Lacrimal Canaliculi, Tactile Corpuscle
Document Summary
Our bodies are constantly exposed to sensory information called stimuli: changes in external and internal environment. Our conscious awareness to these stimuli is called sensation. Stimuli are detected by receptors in our body. Sensation (only become aware if impulse reaches cerebral cortex) General senses receptors (skin, touch, temperature, pain, pressure, stretch, walls of viscera) Special senses receptors (head and neck region) gustation, olfaction, vision, equilibrium, and o. Modality of stimulus = based on the stimulating agent: Chemoreceptors detect specific molecules dissolved in fluid (taste receptors, olfactory cells in. Baroreceptors detect pressure changes within body structures (connective tissues in walls and vessels. Thermoreceptors detect changes in temperature (skin, walls of organs) heat unmyelinated, cold . Photoreceptors detect changes in light intensity, color and movement of light (eyes) Mechanoreceptors detect physical deformation due to touch, pressure, vibration and stretch (hearing. Somatic - detect chemical, heat, or mechanical damage to external body structures or muscles (e. g. ,
