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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
An injury ___ in the spinal cord can lead to paralysis of all limbs.
- a. high
- b. low
Introduction: The embryonic neural tube in all vertebrates develops into spinal cord and brain. The vertebral column consists of spinal cord which is a part of central nervous system. The spinal cord connects the some peripheral nerves to the brain. An injury in the spinal cord results in the loss of sensation or motor function. The peripheral nerve can regrow to an extent, but tracts within the spinal cord do not. As a result, the spinal cord injuries usually cause permanent disability.
Reasons for the correct statement:
An injury to higher spinal cord region can numb limbs as well as muscles involved in breathing. Spinal cord controls both sensory and motor functions and damage in its higher region interrupts the descending respiratory pathways that lead to paralysis of respiratory muscles.
Hence, option a...
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