Sensory cells in the human eye can detect changes in light. The information obtained from these sensory cells is transmitted to the brain through neurons, and the brain determines the correct behavioral response. For example, if the intensity of light being detected by a person's eye rapidly increases, the nervous system might transmit information to the eye that causes the eyelid to close and block out the light. This is an example of a behavioral response that A. must be completed by a single cell. B. is not influenced by an organism's environment. C. requires communication between several individual organisms. D. requires communication between cells and an organ system.
