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Question

Select the incorrect pair of condition and consequence based on human digestion and absorption.

A
Parietal cell secretion blocked: Proteins are not hydrolyzed and decrease in RBC population
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B
Goblet cells non-functional: Smooth movement down the intestine affected
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C
Congenital absence of enterokinase: Carbohydrate digestion
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D
Cholecystectomy: Difficulty in digestion of fat-rich food
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Solution

The correct option is C Congenital absence of enterokinase: Carbohydrate digestion
Enterokinase is an enzyme activator. It activates trypsinogen into trypsin. Trypsin acts on proteins and not carbohydrates. Hence, absence of enterokinase will not affect carbohydrate digestion.

Parietal cells secrete HCl and Castle's intrinsic factor. HCl is essential for activating pepsinogen into pepsin. Pepsin helps in protein digestion. Intrinsic factor helps in the absorption of vitamin B12 which is essential for RBC production.

Goblet cells secrete mucus which helps in the easy passage of food.

Cholecystectomy is removal of gall bladder which will affect digestion of fats. Gall bladder stores bile which contains bile salts that help in the emulsification of fats.

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