homestasis Flashcards
what is homestasis
maintaining a STABLE internal environment despite changing conditions
what are internal conditions
blood pH
blood glucose concentration
what are external conditions
room temperature
amount of fluids you drink
what order are signals passed along the contol system
stimulus-receptor-coordination centre-effector-response
receptor (2)
detect changes in the environment-stimulus (internal and external)
coordination centre
-loactions
interprets changes and organises a response
-brain and spinal cord
effectors
carries out the response
what are the two type of effectors and there jobs
muscles- contract when stimulated
glands-release hormones
what is a stimulus (1)
detects changes in he internal or external environment-detected by receptors
coordinator (3)
where the brain, spinal cord and pancreas that
receive and process information from receptors.
-bodys response on stimulus
effector (4)
Muscles(contract) or glands(release hormones) which bring about responses which restore optimum
levels(best levels)
response (5)
the body responds to the stimulus
what is the central nervous system
The brain and spinal cord which coordinate the
response of effectors.
neurones
carry electrical impulses around the body
synapses
junction between 2 neurones where chemicals are released, allowing impulses to cross
