HSCI 100 Chapter Notes - Chapter 9: Cochlea, Inner Ear, Middle Ear

• School: Simon Fraser University
• Department: Health Sciences
• Course: HSCI 100
• Professor: Nienkevan Houten

Document Summary

They are dendrites of neurons specialized to detect certain types of stimuli. > exteroceptors: detect stimuli from outside the body (taste, hear, smell) > interoceptors: receives stimuli from inside the body (change in blood pressure) > pain receptors responds to chemicals released by damaged tissue, smelling odors, blood ph: photoreceptors. > full bladder, muscle stretching or hearing sound waves. How sensation occurs: sensory receptors respond to environmental stimuli, nerve impulses travel to the cerebral cortex, sensation (conscious perception) of stimuli occurs. Integration of stimuli can modulate the sensation: sensor adaption, in stimulus response ca occur with repetitive stimuli, overall, process = homeostasis. > tips of the dendrites of sensory neurons, are not protected by an accessory structure: encapsulated nerve ending. > connective tissue capsule encloses and protects the tips of the dendrites of sensory neurons: when compressed, merkel disk tells us that something had touched us.