Homeostasis Flashcards
What must every organism in an open system do?
exchange matter and energy with it’s surroundings
What do animals use to regulate their internal environment
use homeostasis
what is Homeostasis
active maintenance of a steady state within the body
What are the 4 stages of the Homeostatic Control Systems
Stimulus
Sensor
Control
Effector
What is the purpose of the Homeostatic Control System
detect change and direct responses
What is negative feedbck
regulatory mechanism which stimulus causes an opposite output in order to maintain an ideal level
What type of fluctuations does negative-feedback produce?
Small fluctuations
What is one example of Negative Feedback?
Sweating
What is positive feedback?
regulatory mechanism in which a stimulus causes the same output to continue
What type of fluctuations does positive-feedback produce?
Large fluctuations
True or False: Positive-Feedback causes significant changes to the internal state?
True
What is an example of positive feedback?
birth
In body temp regulation what are the Stimulus, Sensor, control, and effector?
Stimulus: body temp exceeds normal
Sensor: nerve cells in skin and brain
Control: Temp regulatory center in brain
Effector: Sweat glands in body
