Question

Find out the wrong statement . 

a)The completion of digestion takes place in small intestine.

b)The gastric juice is secreted by the glands in the stomach wall.

c)There are no enzymes in the bile

d)After digestion the glucose and fructose are absorbed in to the lymph of the lacteal

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Answer 1

The completion of digestion takes place in small intestine.

An overview of digestion in small intestine :

• Muscularis layer of intestine ensures that the incoming chyle mixes well with pancreatic and intestinal secretions.

• Proteins are degraded into dipeptides.

$\sf Proteins \xrightarrow{Trypsinogen/Chymotrypsinogen/Carboxypeptidases} Dipeptides$

• Carbohydrates are reduced to monosaccharides by pancreatic amylases.

• Fats are reduced to monoglycerides and fatty acids by lipases and bile salts.

$\rule{300}{2}$

Gastric Juice is Hydrochloric Acid which is secreted by parietal cells of the stomach.

• HCl facilities the activation of pepsinogen.

• $\sf Fe^{3+} \xrightarrow{HCl} Fe^{2+}$

$\rule{300}{2}$

Bile Juice consists Bile Pigments, Bile salts, cholesterol and phospholipids.

$\rule{300}{2}$

Glucose and Fructose are produced in the intestine through the following ways :

• $\sf Maltose \xrightarrow{Maltase} Glucose + Fructose$
• $\sf Lactose \xrightarrow{Lactase} Glucose + Galactose$
• $\sf Sucrose \xrightarrow{Sucrase} Glucose + Fructose$

Fructose is absorbed by Facilitated Diffusion while Glucose is absorbed into the main blood stream by Passive Diffusion.

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Statement (d) is incorrect.