Biomedical Sciencecommon
A patient with profuse watery diarrhoea caused by enterotoxin receives an oral solution containing sodium and glucose. Before treatment, stool output is high and plasma sodium is 138 mmol/L (reference 135–145 mmol/L). The solution reduces stool volume even though cyclic AMP remains elevated in intestinal epithelial cells. Which transport mechanism accounts for continued fluid absorption?