Homeostasis Flashcards
study of the functions of living things , focus on system mechanisms
Physiology
Maintenance of relatively stable conditions in the internal field environment that surrounds cells. via interdependent relationships
Homeostasis
What are the components of homeostatic control?
sensor- detects deviations from normal, control center - integrates input with a set point, effector - make adjustments to restore to normal
How is extracellular fluid moved throughout the body?
blood vessels and fluid between capillaries and intercellular space
How is extracellular fluid moved throughout the body?
blood vessels and fluid between capillaries and intercellular space
Homeostatic control that is local, built into an organ
Intrinsic - example is increased blood flow from exercising skeletal muscle
Homeostatic control that is systemic, initiated outside an organ
Extrinsic - example nervous and endocrine system
True/False: most homeostatic control systems are positive feedback loops
False most are negative feedbacks which is when something becomes excessive or deficient and a series of changes return the factor to a normal mean
Blood Glucose levels, arterial blood pressure, and CO2 ventilation are all examples of…
negative feedback
This control initiates more stimulus, vicious cycles
positive feedback
Blood clotting, oxytocin release, and nerve signals with sodium are examples of?
Positive feedback
A mechanism to prevent problems before they occur
Feed-forward, which initiates in anticipation to change
delayed negative feedback
adaptive control
Sensory signals to muscles and sensory signals to Gi are examples of
Feed forward systems
Process of achieving stability through environmental change to establish a new “normal”
allostasis, adaption to stressor
