BSC 116 Lecture Notes - Lecture 32: Sliding Filament Theory, Myocyte, Skeletal Muscle
Document Summary
Different types of receptors code external stimuli as action potentials: e. g. , chemoreceptors, mechanoreceptors, photoreceptors. Coded input leads to coded response (more action potential) Animals take in information, process it & respond. Sensory input gets integrated into the central nervous system (brain, nerve cord), response is transmitted by the peripheral nervous system. Neurons: specialized cells that conduct and store information in the nervous system. Sensory receptors convert stimulus energy into changes in membrane potential. Integration = processing might begin even before transmission c. i. Summation on a single receptor cell, multiple receptor cells acting on a single afferent neuron, etc: perception: cns (brain) processing of input from sensory neurons a. i. All perceptions are coded by the paths their action potentials travel. Transduction can be modified in two ways: amplification: strengthening the stimulus; adding energy. E. g. , signal transduction pathways, anatomical modifications: adaptation (not to be confused with adaptation): become unresponsive to constant stimulation. E. g. , keep you from being overwhelmed by sensation.