gcse biology- homeostasis and response

Question	Answer
what is a stimulus?	a change in the environment
what is homesostasis?	maintaining a stable internal environment
what are the three main components of an automatic control system?	receptors, coordination centre and effectors
what does an effector do?	detects a stimulus
what is the role of the coordiantion centre?	receives and organises the information and organises a response
what does an effector do?	produces a response which counteracts the change
what does the nervous system do?	detects and reacts to stiumli
what is the CNS?	central nervous system- consists of the brain and the spinal cord
what does a sensory neurone do?	carries information as electrical impulses from the receptors to the CNS
what does a motor neurone do?	the neurones that carry electrical impulses from the CNS to effectors
give examples of effectors?	all muscels and glands which respond to nervous impulses
what is a synapse?	connection between two neurones
what is a reflex?	a rapid, automatic response to a stimulus that doesn't involve the conscious part of the brain

Resource summary

	Created by masooma khan about 6 years ago