Ans : Some movements of the body occur so rapidly that there is not enough time for nerve signals to travel from the peripheral parts of the body all the way to the brain and then back to the periphery again to control the movement then the brain uses a principle called feed-forward control to cause required muscle contractions. That is, sensory never signals from the moving parts apprise (inform) the brain whether the movement is performed correctly. If not, the brain corrects the feed-forward signals that it sends to the muscles the next time the movement is need. Then, if still further correction is needed, this will be done again for subsequent movements. This called adaptive control.
Adaptive control, in a sense, is delayed negative feedback system.
Q-2 ) What is Automaticity ?
Ans : Our body is made up of about 100 trillion cells organized into different functional structures which known as organs. Each functional structure (organ) contributes its share to the maintenance of homeostatic conditions in the extra-cellular fluid (such as respiratory system maintenance of O2,CO2 conc. GIT provides glucose, amino acid, fatty acid and other nutrients, kidney systems provides electrolytes ), which is called the internal environment. Each cell benefits from homeostasis, and in turn, each cell contributes its share toward the maintenance of homeostasis. As long as normal condition are maintained in this internal environment, the cells of the body continue to live and function properly. So this is called Automaticity.
No comments:
Post a Comment