Which of the following statements is true of irritable bowel syndrome?
A) It is caused due to the exponential growth of the gastrointestinal microbiota.
B) It has many known structural abnormalities and is considered an anatomical disorder.
C) It causes damage to the mucosal lining of the stomach.
D) It is believed to be caused by elevated levels of a neurohormone called serotonin.
Question 2
Which of the following is true of excretion?
A) It generates energy in the form of adenosine triphosphate.
B) It enables cells to work under low oxygen conditions.
C) It involves the removal of solid waste products from the body.
D) It is the removal of metabolic waste products of cells.
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