Tissue: group of cells with a similar structure and specialized function
Organs: made up of two or more types of primary tissue which perform a particular function
Body system: made up of groups of organs that perform related functions and work together to achieve a common goal
Homeostasis
The maintenance of steady states within our bodies coordinated by physiological mechanisms
Homeostatic control systems sense deviations from normal, integrate this information and make appropriate adjustments to restore controlled variable to desired value
Intrinsic controls: local controls that are inherent in an organ
Extrinsic controls: regulatory mechanisms initiated outside an organ, accomplished by nervous and endocrine systems
Feedforward: responses made in anticipation of a change
Feedback:responses made after a change has been detected
Positive feedback systems: amplify an initial change
Negative feedback systems: oppose an initial change
Main homeostatic control system
Components - sensor, control centre, effector
Promotes stability by regulation of a controlled variable through the flow of information along a closed loop
Made with Bullet