How do our bodies collect stimuli as input, and what part of the nervous system is responsible for that process?

Afferent or sensory neurons collect stimuli received by receptors throughout the body, including the skin, eyes, ears, nose, tongue as well as pain and other receptors in the internal organs. Sensory information is transmitted to the central nervous system, which includes the brain and spinal cord

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons