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Sade Mercer

Physiology Week 1 - Homeostasis

QuestionAnswer
Define Homeostasis The relatively constant state maintained by the body
Set Point The range of normal or normal reading
Negative Feedback Loop Opposes or negates change by creating a response that is opposite in direction to the initial disturbance
Positive Feedback Loop Amplifies or reinforces the change that is occurring
Name four basic components of a Control System Variable, Sensory, Integrator, Effector
Variable Any state or condition in the body that can change or vary
Sensory Mechanism Identifies the characteristic or condition being controlled in order to respond to any changes that occur from normal setpoint
Integrator or Control Center Receives input, analyzes and integrates input, determines the value, sends a command to initiate an action necessary to maintain homeostasis
Effector Mechanism Organs that directly influence controlled physiological variables
What are Levels of Control The many complex processes of the body are coordinated at these levels
Intracellular Control Operate at the cell level to regulate functions within the cell mostly by means of gene and enzymes
Intrinsic Control Operate at the tissue and organ level, local control or autoregulation mostly by means of chemical signals
Extrinsic Control Operates at the system and organism level, nervous and endocrine (hormonal) regulation outside of the controlled organ
Created by: SadeMercer
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