Digestion and Absorption NEET PYQs (1988–2023)

Solved Digestion and Absorption PYQs

3 recent questions with answers. The full set of 105 is free to practise.

1. NEET 2023MediumDigestive System
   Q1

   Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by
   
   [NEET 2023]

   • AIleo-caecal valve
   • BGastro-oesophageal sphincter
   • CPyloric sphincter
   • DSphincter of Oddi

   Show answer & solution

   Correct answer: (A)

   Option (1) is the correct answer because the undigested food (faeces) enters into caecum of the large intestine through ileo-caecal valve, which prevents the backflow of the faecal matter.
   
   Option (2) is not the answer because a muscular sphincter i.e., the gastro-oesophageal sphincter regulates the opening of oesophagus into the stomach.
   
   Option (3) is not the answer because pyloric sphincter regulates the opening in between stomach and duodenum. Option (4) is not the answer because the opening of common hepato-pancreatic duct is guarded by sphincter of Oddi.
2. NEET 2023MediumDisorders of the Digestive System
   Q2

   Diacetyl morphine is also called as :
   
   [NEET 2023 mpr]

   • AAmphetamine
   • BBarbiturate
   • CCrack
   • DSmack

   Show answer & solution

   Correct answer: (D)

   Diacetylmorphine is a semi-synthetic opioid synthesized from morphine, a derivative of the opium poppy. It is more commonly known by its street name "heroin," but it is also sometimes referred to as "smack."
   
   Amphetamine, barbiturates, and crack are different types of drugs. Amphetamines are a type of stimulant, barbiturates are depressants, and crack is a form of cocaine that can be smoked.
3. NEET 2023MediumAbsorption of Digested Products
   Q3

   Select the correct sequential steps regarding absorption of fatty acids and glycerol, in intestine.
   
   (A) Micelles are reformed into small protein coated fat globules called chylomicrons.
   
   (B) Micelles move into intestinal mucosa.
   
   (C) Fatty acids and glycerol are incorporated into small droplets called micelles.
   
   (D) Lacteals release the absorbed substances into blood stream.
   
   (E) Chylomicrons are transported into lacteals.
   
   Choose the correct answer from the options given below : [NEET 2023 mpr]

   • A(A), (E), (B), (D), (C)
   • B(D), (E), (B), (C), (A)
   • C(C), (B), (A), (E), (D)
   • D(B), (C), (E), (A), (D)

   Show answer & solution

   Correct answer: (C)

   The steps in the digestion and absorption of fatty acids and glycerol in the intestine are as follows :
   
   (C) Fatty acids and glycerol are incorporated into small droplets called micelles. These micelles are formed in the lumen of the small intestine.
   
   (B) Micelles move into intestinal mucosa. They break down, releasing the fatty acids and glycerol, which then diffuse into the cells of the intestinal mucosa.
   
   (A) Within these cells, the fatty acids and glycerol are reassembled into triglycerides. These triglycerides are then packaged with proteins and other substances into tiny, protein-coated fat globules called chylomicrons.
   
   (E) The chylomicrons are extruded from the cells into the lymphatic system - specifically into tiny lymph vessels in the intestinal wall called lacteals.
   
   (D) These lacteals ultimately transport the chylomicrons, and therefore the digested fat, into the bloodstream. The absorbed substances are then circulated to cells throughout the body.

Topic-wise question count

Where NEET has asked from Digestion and Absorption, most frequent first.

• Digestive System37
• Disorders of the Digestive System29
• Digestion of Food29
• Absorption of Digested Products10

Year-wise Digestion and Absorption questions in NEET

Number of questions from this chapter in each year's paper(s).