The right answer is spinal cord.
When a stimulus, calling for an immediate response, is perceived by a receptor housed in a part of the body, the nerve impulse propagates on the afferent fibers towards the spinal cord or the brainstem. After the passage through one or more synapses of the motor neurons, the afferent response - in the form of a second nerve impulse - goes to the effector organ (muscle for example) or to the motor centers, upper or lower (medullary nuclei of spinal cord or central nuclei, muscle tone of the cerebellum, awareness of the cortex, etc.)
Reflexes are sometimes stimulated for diagnostic purposes, especially in the neurological assessment; each reflex corresponds to an area of the spinal cord.
The correct answer is spinal cord.
The involuntary actions of the body is controlled by the spinal cord. The unconscious actions of the body that takes place simultaneously just after the body receives stimulus is called the reflex action.
This is controlled by the spinal cord.
The response to light, heat or any other stimuli which is not pre-planned is controlled by the spinal cord of the body.
