GI system: Absorption of Nucleic acids, Vitamins, electorlyte and water

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M/C quiz for studying BMSC 208

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Ervine Santiago

Canada

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GI system: Absorption of Nucleic acids, Vitamins, electorlyte and water


GI system: Absorption of Nucleic acids, Vitamins, electorlyte and waterVersion en ligne M/C quiz for studying BMSC 208 par Ervine Santiago 1 (Digestion of Nucelic acids) What are the 3 subunits of a nucleotide a Nitrogenous base b Pentose sugar c phosphate d All of the above 2 Nucleic acids are digested into and how Choose one or more answers a into fatty acids b by lipases c into Nuceloside and phophate d by pancreatic and intestinal nuceotidase 3 True or False: Nitrogenous bases are abosrbed by active transport a True b False c d 4 (absoprtion of Vitamins) Fat soluble vitamins (ADEK) are absorbed with: a Intestinal Lipids b Water c Proteins d electrolytes 5 What are the absorption efficiency of the fat soluble vitamins. Choose one or more answers a ADK- 50 to 80 % b ADK-20 to 30 % c E=50 to 80% d E- 20 to 30% 6 What are Soluble vitamins Choose one or more answers a B b C c A d K 7 Vitamin B12 (Cobalamin) absoprtion requires what secreted product from the parietal cells of the stomach. a Intrinsinc Factor b HCl c nutrients d lipids 8 How does Vitamin B12 get released from ingested proteins a by pepsin and low gastric pH b just low gastric pH c by pepsin only d none of these 9 How is Haptocrrin secreted and how is it degraded in the VIt B12 complex a When it reaches the duodennum, Heptacorrin gets degraded by pancreatic proteases. b When it reaches the large intestine, Heptacorrin gets degraded by pancreatic proteases. c d 10 Vitamin B12 IF(intrisinc Factor) is highly resistanct to enzyme degradation and DOES NOT bind to IF receptors for absorption of Vitamin B12. a FALSE b TRUE c d 11 (Absorption of eletrolytes) Why is Fe 2+ asborption improtant. a homeostasis of erythropeoises b Homeostasis of ossification c d 12 How is Heme Absorbed and what does it dissociate into? Choose one or more answers a by apical transporter b by GLUT2 c dissociates into Porphyrin and Fe 2+ d does not dissociate 13 Luminal iron (Fe2+) enters.asborbed at apical luminal surface via: a GLUT 2 b DMT1 (divalent metal transpoter) with H ions c Na/K ATPase d passive diffusion 14 true or Flase. cytosolic ionized iron (Fe 2+) leave the basolateral surface of the cell by ferroportin a True b False c d 15 a decrease in plasma [Ca2+] does what: a Stimulate parthyroid glands to produce PTH b stimulate gastric glands to produce gastrin c increase contraction of muscles d does nothing 16 What does PTH do a converts calictrol into active form of VItamine D b allows excrection of Ca 2+ c it interacts with other electrolytes d nothing 17 True or false: Most calcium absoprtion in the intestine occurs by Passivecellular movement. a true b false c d 18 apical uptake of Ca2+ happens how? Choose one or more answers a through calcium channels b through Na/K ATPase c is concentration dependent d not concentration dependent 19 Ca 2+ activelt transported through basolateral membrane how? Choose one or more answers a Ca 2+ ATPase b Na Ca2+ Antiporter c GLUT 2 d SGLT 20 Water absorption in the intestine is mainly driven by osomotic gradients from nutrients and electrolytes. a True b False 21 How much water is absorbed in the small intestine a 7.5 L b 1L c 2L d 6.5L 22 Sodium absorption at the apical membrane is gradient driven. a True b False c d 23 Basolateral absorption of Na does not require ATPase? a False b True c d

GI system: Absorption of Nucleic acids, Vitamins, electorlyte and water

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GI system: Absorption of Nucleic acids, Vitamins, electorlyte and waterVersion en ligne

par Ervine Santiago

(Digestion of Nucelic acids) What are the 3 subunits of a nucleotide

Nucleic acids are digested into and how

True or False: Nitrogenous bases are abosrbed by active transport

(absoprtion of Vitamins) Fat soluble vitamins (ADEK) are absorbed with:

What are the absorption efficiency of the fat soluble vitamins.

What are Soluble vitamins

Vitamin B12 (Cobalamin) absoprtion requires what secreted product from the parietal cells of the stomach.

How does Vitamin B12 get released from ingested proteins

How is Haptocrrin secreted and how is it degraded in the VIt B12 complex

Vitamin B12 IF(intrisinc Factor) is highly resistanct to enzyme degradation and DOES NOT bind to IF receptors for absorption of Vitamin B12.

(Absorption of eletrolytes) Why is Fe 2+ asborption improtant.

How is Heme Absorbed and what does it dissociate into?

Luminal iron (Fe2+) enters.asborbed at apical luminal surface via:

true or Flase. cytosolic ionized iron (Fe 2+) leave the basolateral surface of the cell by ferroportin

a decrease in plasma [Ca2+] does what:

What does PTH do

True or false: Most calcium absoprtion in the intestine occurs by Passivecellular movement.

apical uptake of Ca2+ happens how?

Ca 2+ activelt transported through basolateral membrane how?

Water absorption in the intestine is mainly driven by osomotic gradients from nutrients and electrolytes.

How much water is absorbed in the small intestine

Sodium absorption at the apical membrane is gradient driven.

Basolateral absorption of Na does not require ATPase?