Digestion Set 7

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This set of Digestion Multiple Choice Questions & Answers (MCQs) focuses on Digestion Set 7

Q1 | Choose a single incorrect answer about absorption from small intestine:
  • Gastric HCL help iron absorption
  • K+ions are absorped passively.
  • HCO3- ions are absorbed passively.
  • none
Answer: HCO3- ions are absorbed passively.
Q2 | The absorptive surface area of small intestineis over:
  • 2.8m
  • 250m2
  • 7m
  • 50m2
Answer: 250m2
Q3 | Intestinal motility help absorption from small intestine by all thefollowing except:
  • Increase blood and O2 supply.
  • Increase lymph flow.
  • Increase osmotic pressure.
  • Increase contact of food with mucosa.
Answer: Increase osmotic pressure.
Q4 | The following statement about calcium absorption from smallintestine are true except:
  • It occurs by active transport.
  • It requires vit. D and parathormone.
  • It occours by passive diffusion from upper small intestine.
  • It is decreased by excess phosphate and oxalate in food.
Answer: It occours by passive diffusion from upper small intestine.
Q5 | The following are true statement about fat absorption from small intestine except:
  • It is helped by bile salts.
  • Glycerol and short chain FAs are absorped passively.
  • Deficiency of fat absorption leads to poor absorption of VIT.B complex.
  • Chylomicrons are extruded into Lacteal laterals by exocytosis.
Answer: Deficiency of fat absorption leads to poor absorption of VIT.B complex.
Q6 | The transport of glucose across intestinal mucosa is directly dependent Upon the following except:
  • Na concentration in intestinal lumen.
  • Plasma insulin.
  • Inhibitors of energy metabolism.
  • none
Answer: Plasma insulin.
Q7 | Absorption of fat soluble vitamins require the following:
  • Bile.
  • Bile and chymotrypsine.
  • Bile and pancreatic amylase.
  • None of the above.
Answer: Bile.
Q8 | The major site of absorption of VIT B12 is:
  • Duodenum.
  • Jujenum.
  • Colon.
  • Ileum.
Answer: Ileum.
Q9 | The following are true statement about absorption from small intestine except:
  • Hexose are absorped faster than pentose.
  • D amino acids are absorped better than L amino acids.
  • Glucose is absorped faster than fructose.
  • none
Answer: D amino acids are absorped better than L amino acids.
Q10 | The amount of water excreted in stool is about:
  • 100mld
  • 0.5Ld
  • 0.4Ld
  • none
Answer: 100mld
Q11 | Absorption of Na ions from small intestine occur by the following except:
  • Special Na channel.
  • Cotransported with Cl.
  • Cotrannsported with glucose and amino acids.
  • None of the above.
Answer: None of the above.
Q12 | Absorption of Cl- ions from small intestine occur by the following ways except:
  • 2ry active transport.
  • 1 ry active transport.
  • Passive diffusionparacellularly.
  • none
Answer: 1 ry active transport.
Q13 | All of the followings are absorped by Na dependent 2ry active transport except:
  • Glucose and galactose.
  • Amino acids.
  • VitaminC
  • VitaminB.12
Answer: VitaminB.12
Q14 | The following are true statement about iron absorption from small intestine except:
  • It is actively absorped from duodenum and jejunum.
  • Its absorption is decreased by tannin.
  • Its absorption is helped by vitamin C.
  • It is transported from the brush borderas Fe+3 or heme.
Answer: It is transported from the brush borderas Fe+3 or heme.
Q15 | Fructose is absorped from small intestine by :
  • Simple diffusion.
  • Facilitated diffusion.
  • Na+ dependent 2ry active transport.
  • none
Answer: Facilitated diffusion.
Q16 | Pentose is absorped from small intestine by:
  • Simple diffusion.
  • Facilitated diffusion.
  • Na+ dependant 2ry active transport.
  • none
Answer: Simple diffusion.
Q17 | Whole proteins may be absorped from small intestine by :
  • Pinocytsis.
  • Na+dependant 2ry active transport.
  • Facilitated diffusion.
  • none
Answer: Pinocytsis.
Q18 | Vitamin D is absorped from small intestine as the absorption of :
  • Water soluble vitamins.
  • Glycerol.
  • Cholesterol.
  • Short chain fatty acids
Answer: Cholesterol.
Q19 | VitaminC is absorped from small intestine by:
  • Passive diffusion.
  • Na+ dependant 2ry active transport.
  • 1ry active transport.
  • none
Answer: Na+ dependant 2ry active transport.
Q20 | Peristaltic contractions of small intestine are characterized by all of the followings except:
  • They are myogenic
  • They are due to local axon reflex
  • They are stimulated by gastro-enteric reflex
  • none
Answer: They are myogenic
Q21 | The following reflexes inhibit small intestine motility except:
  • Peritoneo-intestinal
  • Reno-intestinal
  • Gastro-ileal.
  • Somato-intestinal.
Answer: Gastro-ileal.
Q22 | Rhythmic segmentation of small intestine is characterized by the following except:
  • It is due to local axon reflex.
  • It is myogenic.
  • Its frequency is determined by BER.
  • Its main function is to mix chyme with the digestive juice.
Answer: It is due to local axon reflex.
Q23 | Peristaltic waves in the small intestine are characterized by thefollowing statement except:
  • They occur in response to distention of the wall.
  • Can be abolished by local application of coccaine
  • They are controlled primarily by extrinsic innervation
  • none
Answer: They are controlled primarily by extrinsic innervation
Q24 | Migration motor complex is characterized by the following except:
  • It starts in the stomach and spread to terminal ilium.
  • Occurs every1-1.5h.
  • It helps digestion of food
  • It prevents duodeno-gastric reflux.
Answer: It helps digestion of food
Q25 | Peristaltic rush are characterized by the following except:
  • They are strong peristaltic contraction.
  • They occur normally.
  • they occur when there is intense irritation or distention of the small intestine.
  • They are intiated by reflexes involving the intrinsic and extrinsic nerves.
Answer: They occur normally.
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