Answer:
1. HOMEOSTASIS The cells can survive, if the temperature, pressure and chemical composition of their fluid environment remains constant. The surrounding environment of the body provides oxygen and nutrients required by all cells of the body. Homeostasis means standing or staying the same.
2. HOMEOSTASIS Homeostasis does not mean something set and stay exactly the same all the time. It means a condition that may vary, but which is relatively constant. Homeostasis can be defined as the stable state of an organism or its internal environment as the maintenance or regulation of the stable condition, or its equilibrium; or simply as the balance of bodily functions.
3. HOMEOSTASIS There are three basic components of feedback mechanism of homeostasis:- a) Sensory mechanism b) Control centre c) Effector mechanism
4. HOMEOSTASIS a) Sensory mechanism :The process of regulation & the concept of “return to normal” first requires that the body should be able to “sense” or identify the variables being controlled.
5. HOMEOSTASIS Specialized nerve cells or hormone producing (endocrine) glands frequently act as homeostasis sensors. The sensors may respond to any change. If there is any change, the nerve impulse or hormone stimulates to transmit information to control centre.
6. HOMEOSTASIS b) Control centre: will receive input from sensor. It will analyze and integrate the information & specify the action. The control centre will send its message to third part .i.e. effector.
7. HOMEOSTASIS c) Effectors: are organs such as muscles or glands that directly influence controlled physiological variables. For example, it is the action of the effector to increase or decrease the heart rate, temperature, B.P, sugar concentration etc.
8. HOMEOSTASIS DETECTOR (SPECIALIZED TEMPERATURE SENSITIVE NERVE ENDINGS) CONTROL CENTRE (GROUPS OF CELLS IN THE HYPOTHALAMUS OF BRAIN) EFFECTOR (SKELETAL MUSCLES SHIVERING) BLOOD VESSELS IN THE SKIN BEHAVIOURAL CHANGES ( PUTTING ON MORE CLOTHES, CURLING UP) STIMULATION INHIBITION +-
Explanation:
