Lecture #2 Chapter #1 Flashcards
What is homeostasis?
All body systems working together to maintain a stable internal environment
What type of conditions does the body systems respond to to maintain homeostasis?
Both external and internal changes
What happens with a loss of homeostatic control?
Disease results
What mechanisms are involved in homeostasis?
The stimulus, the sensor/receptor, the integrator/control center, the effector, and the compensatory response
What is the stimulus in the homeostasis progression?
A change in the environment
What is the sensor/receptor in the homeostasis progression?
The receiver of the stimulus
What is the integrator or the control center in the homeostasis progression?
It’s a process is the signal and sends instructions
What is the effector in the homeostasis progression?
It is the thing that carries out the instructions
What is the compensatory response in the homeostasis progression?
The physiological action that returns the condition to a set point
What are the two types of feedback systems? 
Negative and positive feedback systems
What is a negative feedback system?
A change in a factor triggers a response to oppose the change and restore the factor to normal by moving the factor in the opposite direction of its initial change
Returning to a setpoint
What is a positive feedback system?
Intensifying adding to the change
What is the role of a negative feedback system?
The response of the effector negates the stimulus in the body is brought back into homeostasis which results in the normal range being achieved
What is the role of a positive feedback system?
The response of the factor increases the change of the stimulus moving the body away from homeostasis causing the normal range to be lost and speeding up the process
Typically occurs in a special condition
What happens if systems fail to achieve and restore balance?
Disease and death results
