Intrinsic factor of Castle, secreted by parietal cells of gastric glands plays an important role in erythropoiesis. It is necessary for the absorption of vitamin B12 (which is called extrinsic factor) from GI tract into the blood. Vitamin B12 is an important maturation factor during erythropoiesis. Absence of intrinsic factor in gastric juice causes deficiency of vitamin B12, leading to pernicious anaemia.
২.
Absorption of amino acid is slower in
ক
ক) Stomach
খ
খ) Duodenum
গ
গ) Jejunum
ঘ
ঘ) Ileum
সঠিক উত্তর: ঘ
ঘ) Ileum
উত্তর
সঠিক উত্তর: ঘ
ঘ) Ileum
ঘ
ব্যাখ্যা
Absorption of amino acids is faster in duodenum and jejunum and slower in ileum.
৩.
Micelle formation is necessary for the intestinal absorption of
ক
ক) Galactose
খ
খ) Leucine
গ
গ) bile acids
ঘ
ঘ) Vitamin D
সঠিক উত্তর: ঘ
ঘ) Vitamin D
উত্তর
সঠিক উত্তর: ঘ
ঘ) Vitamin D
ঘ
ব্যাখ্যা
Micelles provide a mechanism for solubilizing fat-soluble nutrients in the aqueous solution of the intestinal lumen until the nutrients can be brought into contact with and absorbed by the intestinal epithelial cells. Because vitamin D is fat soluble, it is absorbed in the same way as other dietary lipids.
৪.
Absence of intrinsic factor of castle may lead to
ক
ক) Iron deficiency anaemia
খ
খ) Pernicious anaemia
গ
গ) Haemolytic anaemia
ঘ
ঘ) Sideroblastic anaemia
সঠিক উত্তর: খ
খ) Pernicious anaemia
উত্তর
সঠিক উত্তর: খ
খ) Pernicious anaemia
খ
ব্যাখ্যা
Intrinsic factor of Castle, secreted by parietal cells of gastric glands plays an important role in erythropoiesis. It is necessary for the absorption of vitamin B12 (which is called extrinsic factor) from GI tract into the blood. Vitamin B12 is an important maturation factor during erythropoiesis. Absence of intrinsic factor in gastric juice causes deficiency of vitamin B12, leading to pernicious anaemia.
৫.
Which of transporter is used by all of the monosaccharides?