What is the role of sodium in the human body? I- Responsible for the osmolality of the extracellular fluid. II- Exerts an important role in neurom...
What is the role of sodium in the human body?
I- Responsible for the osmolality of the extracellular fluid.
II- Exerts an important role in neuromuscular excitability.
III- The extracellular content of Na is much greater than the intracellular content.
IV- The serum sodium concentrations and serum osmolarity are kept under control by homeostatic mechanisms involving thirst, antidiuretic hormone (ADH) and renal sodium filtration.
a) I, II and III are correct.
b) II, III and IV are correct.
c) I, III and IV are correct.
d) All are correct.
I- Responsible for the osmolality of the extracellular fluid.
II- Exerts an important role in neuromuscular excitability.
III- The extracellular content of Na is much greater than the intracellular content.
IV- The serum sodium concentrations and serum osmolarity are kept under control by homeostatic mechanisms involving thirst, antidiuretic hormone (ADH) and renal sodium filtration.
a) I, II and III are correct.
b) II, III and IV are correct.
c) I, III and IV are correct.
d) All are correct.
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Ed 
A resposta correta é a alternativa c) I, III e IV estão corretas. O sódio desempenha um papel importante no corpo humano. Ele é responsável pela osmolalidade do fluido extracelular, o conteúdo extracelular de sódio é maior do que o conteúdo intracelular, e as concentrações séricas de sódio e a osmolaridade sérica são controladas por mecanismos de homeostase que envolvem a sede, o hormônio antidiurético (ADH) e a filtração renal de sódio.
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