Introduction to Physiology and Homeostasis 🗸 Flashcards
Tissue
group of cells with similar structure and specialized function
Organs
made of two or more types of primary tissue which perform a particular function
Body systems
two or more organs which work together to perform a related function
Homeostasis
the maintenance of steady states within our bodies coordinated by physiological mechanisms
intrinsic control
local controls that are inherent in an organ
extrinsic controls
regulatory mechanisms initiated outside an organ, accomplished by endocrine and nervous systems
feedforward
responses in anticipation of change
feedback
responses made because of change
Positive feedback
amplify an initial change
negative feedback
opposes an initial change
how does negative feedback promote stability?
regulation of controlled variables through the flow of information in a closed loop
main homeostatic control system
negative feedback
components of main homeostatic control system
sensor, control centre, effector
