Physiology The principle that in spinal cord, the dorsal roots are sensory and the ventral roots are motor, is known as: A Bell-Magendie law B Dale's principle C Monro-Kellie hypothesis D Muller's doctrine 💡 Explanation The principle that in spinal cord, the dorsal roots are sensory and the ventral roots are motor, is known as: ✓ Correct Answer: A. Bell-Magendie law