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NEET UG Digestion Absorption — practice questions — page 2

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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Digestion Absorption questions and exercises with answers

Showing questions 31–60 of 86.

Which phase of digestion begins with gastric secretions triggered by the sight and smell of food?Read the answer and worked solution →Roughly how long is the human gastrointestinal tract from mouth to anus?Read the answer and worked solution →In which organ does most of the digestion of food take place?Read the answer and worked solution →Fully digested chyme absorbed as chyle passes into which system?Read the answer and worked solution →What is the area of the mouth between the teeth, lips and cheeks called?Read the answer and worked solution →The main component of mucus is a glycoprotein called what?Read the answer and worked solution →At which structure does the soft palate end?Read the answer and worked solution →Which are the largest of the main salivary glands?Read the answer and worked solution →Which pair of salivary glands produces about 70% of the saliva in the mouth?Read the answer and worked solution →Which salivary glands lie under the tongue and give a mainly mucous secretion?Read the answer and worked solution →Serous glands that encircle taste buds at the back of the tongue and make lingual lipase are called what?Read the answer and worked solution →Salivary amylase converts the starch in food mainly into which sugar?Read the answer and worked solution →Haptocorrin in saliva binds and protects which vitamin through the acidic stomach?Read the answer and worked solution →The umami taste is thought to signal food rich in which nutrient?Read the answer and worked solution →What is the hardest tissue in the human body?Read the answer and worked solution →Which teeth are mainly used for tearing food?Read the answer and worked solution →The oesophagus passes through the diaphragm at the level of which vertebra?Read the answer and worked solution →Failure of the lower oesophageal sphincter commonly leads to which problem?Read the answer and worked solution →Gastrin, which stimulates gastric juice production, is made by which cells?Read the answer and worked solution →Pepsinogen in the stomach is converted to active pepsin by what?Read the answer and worked solution →Gastric lipase from the chief cells is best described as which kind of lipase?Read the answer and worked solution →What is the thick semi-liquid mass that leaves the stomach called?Read the answer and worked solution →Intrinsic factor, needed to absorb vitamin B12, is produced by which cells?Read the answer and worked solution →Vitamin B12 bound to intrinsic factor is absorbed in which part of the gut?Read the answer and worked solution →Pancreatic lipase breaks a triglyceride into which products?Read the answer and worked solution →Which hormone from the duodenum triggers release of bile from the gallbladder?Read the answer and worked solution →Which ion in pancreatic duct secretions helps neutralise acidic chyme?Read the answer and worked solution →Trypsinogen is activated to trypsin in the duodenum by which enzyme?Read the answer and worked solution →Chymotrypsinogen is converted into active chymotrypsin by which enzyme?Read the answer and worked solution →Why does the pancreas release its proteases as inactive zymogens?Read the answer and worked solution →

Worked practice questions

Which phase of digestion begins with gastric secretions triggered by the sight and smell of food?

  1. Cephalic phase
  2. Gastric phase
  3. Intestinal phase
  4. Absorptive phase
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Correct answer: A. Cephalic phase

The cephalic phase starts when the sight and smell of food make gastric glands secrete, before food reaches the stomach.

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Roughly how long is the human gastrointestinal tract from mouth to anus?

  1. About 3 metres
  2. About 9 metres
  3. About 15 metres
  4. About 25 metres
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Correct answer: B. About 9 metres

The GI tract runs from the mouth to the anus over a distance of about nine metres, or 30 feet.

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In which organ does most of the digestion of food take place?

  1. Gallbladder
  2. Large intestine
  3. Small intestine
  4. Oesophagus
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Correct answer: C. Small intestine

The small intestine carries out most chemical digestion and absorbs water and nutrients into the blood.

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