B1.6 Nervous System and Hormones -Homeostasis Flashcards
Homeostasis
The regulation of conditions in a cell or organism in order to optimally respond to internal and external changes
Internal change
A change in conditions that occurs within a cell or organism
External change
A change in conditions that occurs outside of a cell or organism
Regulation
To control or maintain conditions so that they work at their optimum rate
Optimal conditions
The specific conditions that enables enzymes and cells to function at their best
Nervous response
An electrochemical response brought about by nerve cells
Chemical response
A chemical response brought about by hormones
Blood glucose level
The blood sugar level in the body which is controlled by homeostasis to regulate respiration and metabolism
Body temperature
The amount of heat in the body which is controlled by homeostasis to ensure enzymes function properly
Water level
The amount of water in the body which is controlled by homeostasis to regulate conditions for osmosis
Automatic control system
A control system that operates without human intervention
Receptor
Cells that detect stimuli
Stimuli
Changes in the environment
Coordination centre
Brain, spinal cord and pancreas that receive and process information from receptors
Effectors
Muscles or glands which bring about responses to restore optimum levels
