Question 1

The function of tongue is to

Accepted Answer

In humans the tongue helps in the ability to taste, serves as a muscle that pushes chewed food into the throat while mixing with saliva. The tongue also assists with speech for humans.

Question 2

A specialized structure in intestine that helps in absorption is

Accepted Answer

The innermost layer lining the lumen of the alimentary canal is the mucosa.This layer forms irregular folds (rugae) in the stomach and small finger-like foldings called villi in the small intestine.The cells lining the villi produce numerous microscopic projections called microvilli giving a brush border appearance found on the apical surface of some epithelial cells. These modifications increase the surface area enormously and help in secretion and absorptionHence, the specialized structure in the intestine that helps in absorption is villi.So, the correct answer is 'villi'.

Question 3

Substrate of amylase enzyme is

Accepted Answer

Hydrolases catalyze hydrolytic reactions. Some of the important hydrolases include amylases, sucrase, lactase, maltase, protease, esterase etc. Amylase catalyzes the hydrolysis of starch (polysaccharide form of glucose) into maltose (a disaccharide of glucose).

Question 4

Which one of the following is the matching set of gland andits secretion?

Accepted Answer

The pancreas and salivary gland make amylase (alpha amylase) hydrolyze dietary starch into disaccharides and trisaccharides, which are converted by other enzymes to glucose. Plants and some bacteria also produce amylase. Whereas thyroxin is secreted by the thyroid gland, Vasopressin is secreted by pituitary gland and secretin is secreted by the duodenum. Thus, the correct answer is option B.

Question 5

Milk protein is acted upon by a gastric enzyme

Accepted Answer

In young mammals, milk protein caseinogens are digested with the help of an enzyme called rennin. HCl converts prorennin into active rennin. Rennin curdles milk protein caseinogen, which is hydrolyzed into casein and lastly to calcium paracasein.

Question 6

Which one of the following pairs of food components in humans reaches the intestine totally undigested?

Accepted Answer

Humans do not have the enzyme cellulase to degrade the beta 1, 4 bonds of cellulose. In the large intestine, bacteria may partially degrade some cellulose. Lipids or fats are digested and absorbed in the small intestine.

Question 7

Digestion of starch takes place in

Accepted Answer

Carbohydrate digestion begins in the mouth. The salivary glands in the mouth secrete saliva, which helps to moisten the food.The food is then chewed while the salivary glands also release the enzyme salivary amylase, which begins the process of breaking down the polysaccharides in the carbohydrate food.But this activity is much less important than that of pancreatic amylase in the small intestine which digests carbohydrates. Hence, Digestion of starch takes place in the buccal cavity and small intestine.So, the correct answer is 'buccal cavity and small intestine'.

Question 8

Give a brief account on absorption of food in small intestine.

Accepted Answer

Absorption of food - It occurs in small intestine. Several enzymes released by Liver, Pancreas, wall of stomach and small intestine help in digestion of food. After digestion the nutrients absorbed by the inner wall of Intestine. At the inner wall of Intestine a large number villi present which increases surface are for more absorption. In villi very minute pores present which helps in absorption.

Question 9

The enzyme added to the starch solution for its break down may have been

Accepted Answer

Salivary amylase is an enzyme that breaks starch down into sugar and is present in human saliva, where it begins the chemical process of digestion.

Question 10

Mode of infection in diarrhoea is

Accepted Answer

Diarrhea is the condition of having at least three loose or liquid bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss. Signs of dehydration often begin with loss of the normal stretchiness of the skin and irritable behavior. This can progress to decreased urination, loss of skin color, a fast heart rate and a decrease in responsiveness as it becomes more severe. These infections are often acquired from food or water that has been contaminated by feces, or directly from another person who is infected. Hence, the mode of infection of diarrhea is food.So, the correct answer is 'food'.

Digestion And Absorption

Biology
7214 Views

The function of tongue is to

A specialized structure in intestine that helps in absorption is

Substrate of amylase enzyme is

Which one of the following is the matching set of gland and
its secretion?

Milk protein is acted upon by a gastric enzyme

Which one of the following pairs of food components in humans reaches the intestine totally undigested?

Digestion of starch takes place in

Give a brief account on absorption of food in small intestine.

The enzyme added to the starch solution for its break down may have been

Mode of infection in diarrhoea is

Digestion And Absorption

Biology 7214 Views

The function of tongue is to

A specialized structure in intestine that helps in absorption is

Substrate of amylase enzyme is

Which one of the following is the matching set of gland and its secretion?

Milk protein is acted upon by a gastric enzyme

Which one of the following pairs of food components in humans reaches the intestine totally undigested?

Digestion of starch takes place in

Give a brief account on absorption of food in small intestine.

The enzyme added to the starch solution for its break down may have been

Mode of infection in diarrhoea is

Biology
7214 Views

Which one of the following is the matching set of gland and
its secretion?