While the movements of the smooth muscles are always involuntary, those of the skeletal muscles are almost always the result of a conscious, voluntary command from the central nervous system. The movements of the skeletal muscles may, in some instances, be involuntary, known as reflexes. Reflexes, which are fast and automatic, are responses to external stimuli, like attacks, or re-establish the body's position and balance. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / QA International |
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