Coordination Of Cellular Activity With Changing Demands Of The Internal And External Environment

Cells perceive a variety of chemical and physical factors as indicators of environmental change and respond to them in coordinated and characteristic ways. The final response, or output, of any specific cell and the signals, or inputs, to which it responds are determined by its particular differentiated state. Thus, a pancreatic beta cell perceives glucose and secretes insulin, a muscle cell perceives acetylcholine and contracts, and a retinal cell perceives light and stops releasing inhibitory neurotransmitter. Despite their different specialized functions, however, all cells draw upon a surprisingly limited set of molecular mechanisms to connect input and output.

Diabetes 2

Diabetes 2

Diabetes is a disease that affects the way your body uses food. Normally, your body converts sugars, starches and other foods into a form of sugar called glucose. Your body uses glucose for fuel. The cells receive the glucose through the bloodstream. They then use insulin a hormone made by the pancreas to absorb the glucose, convert it into energy, and either use it or store it for later use. Learn more...

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