In all patients, what locations should be checked for skin color?

Nurses should check for skin color changes on patients in the following locations; the mucous membranes of the mouth, the conjunctiva, and the sclera. These are regions of low pigmentation and therefore, are easy to use in health diagnosis even in patients with deep skin color pigmentation.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.