Homeostasis Flashcards
homeostasis
body’s ability to maintain internal stability
three components of homeostasis
receptor, control center, effector
receptor
monitors the environment and responds to stimuli by sending info to #2 through the afferent pathway
control center
determines the level of response from the input it received and sends the instructions to #3 along the efferent pathway
effector
receives the directions from #2 and carries out the response
afferent pathway
communication pathway between receptor and control center
efferent pathway
communication pathway between control center and effector
negative feedback mechanism
the output (result of action) shuts off or reduces the intensity of the original effect
the direction of change is opposite of the initial change.
positive feedback mechanism
the output (result of action) enhances the original stimulus
the direction of change is the same as the initial change
homeostasis imbalance
the disturbance of homeostasis; often leads to disease
autoregulation/intrinsic
an auto response in the cell, tissue, etc.
extrinsic
responses are controlled by the nervous and endocrine systems
