Module 3, Lecture 1: Homeostasis & Thermoregulation Flashcards
Homeostasis
The process by which the body keeps internal conditions stable despite changes in the environment
Allostasis
Maintaining stability through change
Homeostasis - Input
Sensors detect change in regulated parameters
Homeostasis - Integration
CNS interprets signals from sensors
Homeostasis - Output
Neural/endocrine responses restore set point
Allostasis - Input
sensors detect or anticipate change in energetic demand
Allostasis - Integration
CNS interprets signals about stress or change
Allostasis - Output
neural and endocrine responses initiate processes to maintain energy balance under new conditions
Homeostasis – Time Frame
Moment to moment
Allostasis - Time Frame
Rapid or long-term
Homeostasis – Flexibility
Maintains set point or range
Allostasis – Flexibility
Shifts set points when needed
Homeostasis - Anticipation
Reacts to a change
Allostasis - Anticipation
Reacts but can also prepare ahead of time
Homeostasis – Cost
Routine energy use
Allostasis - Cost
higher energy use
Homeostasis – Traits Regulated
Temperature, pH, osmolarity, O₂, CO₂, Ca, glucose levels
Allostasis – Traits Regulated
Heart rate, metabolism, fat storage, immunity, appetite, emotions
Thermoregulation - Input
Body temperature changes
Thermoregulation - Integration
Hypothalamus integrates information and activates responses
Thermoregulation - Output
Body adjusts through physical and behavioral changes to restore temperature
