Psychology – Gleitman
In many cases, transmission and transduction
are separate functions that are entrusted to different cells. In vision and hearing, there are receptor cells which transduce optic stimulation and air
pressures into electrical changes in the cell. These changes in the receptors trigger impulses in sensory neurons that transmit their info to other
neurons in the nervous sys.
· Motoneurons: have axons that terminate in effector cells. They acticate the skeletal musculature, the muscles which control the skeleton, such as
those of the arms and legs. Cell bodies of the motoneurons are in the spinal cord or brain, and their long axons have terminal branches whose final
tips contact individual muscle cells. When a motoneuron fires, a chemical event is produced at its axon tips which causes the muscle fibers to
contract.
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