Answer:
stimulus-- a thing or event that evokes a specific reaction in an organ or tissue areas that brain which respond to auditory stimuli.
sensory neuron-- sensory neurons are the nerve cells that are activated by sensory input from enviroment.
spinal cord--it is safely contained within the skull and vertebral canal of the spine
muscles--is a soft tissue found in most animals. muscles cells contain protein filaments of actin and myosin that slide past one another producing a contraction that changes both the length and shape of the cell
motor neuros--motor neuros defination is a nuron that pasess from the cental nervous system or a gangliom toward a muscles and conducts an impulse that cause movement.
brain-- that mass of nerve tissue in the anterior end of an organism the brain integrantes sensory information and directs motor responses in higher vertebrates.
sana makatulong :)
