Dan's various medical complaints and hospital stays finally led him to see a psychiatrist. after a thorough medical and psychological evaluation, the 28-year-old teacher and father of two was diagnosed with both depression and somatic symptom disorder. what is atypical about this case summary?

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.