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27 May, 20:34

In response to being startled, an animal involuntarily contracts a skeletal muscle, causing it to shorten. what process is described by an animal's ability to involuntarily contract a skeletal muscle without receiving a direct signal from the brain, and which type of muscle contraction occurred as a result?

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  1. 28 May, 00:21
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    The answer is reflex action. Impulse that triggers a reflex action does not pass through the brain so as to shorten the time for response. It passes through a reflex arch and this is why the muscles are contracted even without time to think of what happened. The sensory and motor neurons only arch at the spinal cord.
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