Digestion and Absorption Question 1
1. Identify the correct statement with reference to human digestive system.
[2020]
(a) Serosa is the innermost layer of the alimentary canal
(b) IIeum is a highly coiled part
(c) Vermiform appendix arises from duodenum
(d) IIeum opens into small intestine
Show Answer
Answer : b
Hints & Solution
(b) Option (b) is correct as ileum is a highly coiled tube. Serosa is the outermost layer of the alimentary canal, thus, option (a) is an incorrect statement. A narrow finger-like tubular projection, the vermiform appendix arises from caecum part of large intestine thus; option (c) is incorrect statement. Ileum opens into the large intestine, thus option (d) is also an incorrect statement. If the end of the ileum has been removed, the intestines also cannot absorb bile acids secreted by the liver, which aid digestion and cannot absorb vitamin B12. Malabsorption causes diarrhea, typically beginning immediately after the surgery. Later, people develop undernutrition and vitamin deficiencies.
