Responding to the environment (humans and plants)

Human responses and plant responses to the environment

receptor

structure that receives a stimulus and converts it into an impulse

effector

gland or organ that brings about a response to stimuli received by the body

stimulus

detectable change in the internal or external environment

impulse

electrical signal created by receptor organs in response to stimuli

transmit

to send something from one place to another

autonomic nervous system

controls our involuntary bodily functions; it is divided into the parasympathetic and sympathetic nervous system

peripheral nervous system

consists of nerves that extend outside the central nervous system (brain and spinal cord)