The control center of reflex actions is [C] In the vertebral cord. Reflex actions are rapid and involuntary responses to stimuli, such as withdrawing your hand from a hot surface. These responses are coordinated by neural circuits located within the spinal cord, bypassing higher brain centers like the cerebrum. When a sensory neuron detects a stimulus, it sends a signal directly to motor neurons in the spinal cord, which then trigger the appropriate muscle response. This allows reflex actions to occur quickly, without needing input or processing from the brain. While the brain, including the cerebrum and cerebellum, plays a role in more complex voluntary movements and coordination, reflex actions are primarily controlled at the level of the vertebral cord, where specialized reflex arcs are responsible for their execution.