NEET Biology question
Not in NEET syllabus
Statement 1: Diarrhoea, an abnormal and frequent movement of the bowels with increased liquidity of the faeces, may be caused by microorganisms, stress, and milk sugar (lactose) intolerance. Statement 2: Mild diarrhoea can be caused by active trophozoites of Trichomonas hominis (deposited on food by flies) in the large intestine; when chyme passes rapidly through the small and large intestine, there is not enough time for the colon to absorb water and electrolytes, resulting in diarrhoea.
Solution
Statement 1 is true: diarrhoea is an abnormally frequent, watery bowel movement caused by infective organisms, stress, or lactose intolerance, among other causes. Statement 2 is also true and explains the mechanism of statement 1 in one such case: the protozoan parasite
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