Pressure ulcers are classified into what stages two three four five

In which way does nicotine cause addiction? by stimulating the brain's pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

Which type of nerve creates a 'mental map" of the relative positioning of the body at any given point in time?

During polarization,potassium has a blank charge,sodium has a blank ch arge ,and calcium has a b l ank. charge