Key Terminology (Grade 12 NSC Matric Life Sciences): Flashcards
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Homeostasis
Homeostasis
Maintaining stable internal conditions
Stimulus
Stimulus
Any detectable change in internal or external environment
Receptor
Receptor
Specialised structure that detects stimuli
Impulse
Impulse
Electrical signal carrying info about detected change
Effector
Effector
Structure that carries out response to stimulus
Peripheral nervous system
Peripheral nervous system
All nerves beyond brain and spinal cord
Autonomic nervous system
Autonomic nervous system
Controls involuntary bodily functions
Sympathetic nervous system
Sympathetic nervous system
Prepares body for action during stress
Parasympathetic nervous system
Parasympathetic nervous system
Promotes rest and recovery
Nervous vs endocrine system speed
Nervous vs endocrine system speed
Nervous: rapid (ms-s); Endocrine: slower (min-hrs)