alleryWhich is the first and shortest section of the small intestine?
- Jejunum
- Ileum
- Duodenum
- Cecum
Show answer and solution
Correct answer: C. Duodenum
The duodenum is the C-shaped first part of the small intestine and also its shortest section.
NEET UG Digestion Absorption — practice questions — page 3
Explore 86 free Digestion Absorption questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 61–86 of 86.
Which is the first and shortest section of the small intestine?Read the answer and worked solution →The small intestine starts at the pyloric sphincter and ends at which structure?Read the answer and worked solution →Brunner's glands, which secrete bicarbonate-rich mucus, are found in which part of the gut?Read the answer and worked solution →What are the lymph capillaries inside intestinal villi called?Read the answer and worked solution →Besides villi, which jejunal structures increase surface area and slow the movement of food?Read the answer and worked solution →Movement of digesting food through the colon typically takes how long?Read the answer and worked solution →The appendix is attached to which part of the gut?Read the answer and worked solution →Which longitudinal muscle bands of the colon produce its bulges, the haustra?Read the answer and worked solution →Protein digestion primarily begins in which organ?Read the answer and worked solution →Duodenal S cells release which hormone in response to acidic chyme?Read the answer and worked solution →Cholecystokinin is released by which duodenal cells?Read the answer and worked solution →What effect does cholecystokinin have on the sphincter of Oddi?Read the answer and worked solution →Lactase converts lactose into which pair of sugars?Read the answer and worked solution →Why can human pancreatic amylase not digest cellulose?Read the answer and worked solution →Which pancreatic protease removes the terminal amino acid from a protein?Read the answer and worked solution →Chymotrypsin breaks proteins mainly at which amino acids?Read the answer and worked solution →Coeliac disease is an autoimmune disorder of which organ?Read the answer and worked solution →Crohn's disease most often starts in which part of the gut?Read the answer and worked solution →Ulcerative colitis is restricted to which parts of the gut?Read the answer and worked solution →A protist parasite confined to the lumen of the small intestine causes which disease?Read the answer and worked solution →Which of these is an accessory digestive organ rather than part of the GI tract?Read the answer and worked solution →Which two parts of the pharynx are involved in the digestive system?Read the answer and worked solution →Why do gastric glands secrete mucus in the stomach?Read the answer and worked solution →Which contractions mix chyme and move it slowly in the small intestine, allowing more absorption time?Read the answer and worked solution →Maltase, lactase and sucrase belong to which group of enzymes?Read the answer and worked solution →Which pancreatic hormone is released when blood sugar is low?Read the answer and worked solution →
Worked practice questions
The small intestine starts at the pyloric sphincter and ends at which structure?
- Sphincter of Oddi
- Anal sphincter
- Cardiac sphincter
- Ileocecal valve
Show answer and solution
Correct answer: D. Ileocecal valve
The ileocecal valve marks the end of the small intestine where the ileum meets the cecum.
Brunner's glands, which secrete bicarbonate-rich mucus, are found in which part of the gut?
- Duodenum
- Jejunum
- Ileum
- Colon
Show answer and solution
Correct answer: A. Duodenum
Brunner's glands are duodenal glands whose alkaline mucus helps neutralise stomach acid.
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