Describe the structure of the small intestine and its role in digestion? -Biology

Describe the structure of the small intestine and its role in digestion? -Biology
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The diagram represents a section through the small intestine.What is the role of the structure labelled X ? (a) They secrete enzymes for digestion (b) They secrete hormones (c) They decrease the surface area of absorption (d) They increase the surface area of absorption

Description : The diagram represents a section through the small intestine.What is the role of the structure labelled X ? (a) They secrete enzymes for digestion (b) They secrete hormones (c) They decrease the surface area of absorption (d) They increase the surface area of absorption

Last Answer : (d) They increase the surface area of absorption

Describe the role of small intestine in digestion of food.

Description : Describe the role of small intestine in digestion of food. 

Last Answer : In small intestine Liver and Pancreas play an important role for digestion of food. Role of Liver: - i) Liver is reddish brown organ present just below the diaphragm (under ribs) on right ... If any food still remain undigested enzymes secreted by glands of small intestine help to digest it. 

(a) Draw a diagram to show the nutrition in Amoeba and label the parts used for this purpose. Mention any other purpose served by this part other than nutrition. (b) Name the glands associated with digestion of starch in human digestive tract and mention their role. (c) How is required pH maintained in the stomach and small intestine? -Biology

Description : (a) Draw a diagram to show the nutrition in Amoeba and label the parts used for this purpose. Mention any other purpose served by this part other than nutrition. (b) Name the glands associated ... mention their role. (c) How is required pH maintained in the stomach and small intestine? -Biology

Last Answer : Answer.(a) Pseudopodia serves the purpose of locomotion apart from nutrition. (b) The salivary gland is associated with digestion of starch in human digestive tract. It secretes saliva which contains ... juice from liver makes the food alkaline in small intestine for the pancreatic enzymes to act.

The saliva pH is approximately 6.8. It is thus a slightly acid pH. Saliva lubricates the food bolus and initiates the enzymatic extracellular digestion of food. It also works as a buffer for the mouth pH and it has an important role of having IgA antibodies (also present in tears, colostrum, mother’s milk and in the mucosae of the intestine and airways) that protect the organism against pathogens.

Description : The saliva pH is approximately 6.8. It is thus a slightly acid pH. Saliva lubricates the food bolus and initiates the enzymatic extracellular digestion of food. It also works as a buffer for the ... 's milk and in the mucosae of the intestine and airways) that protect the organism against pathogens.

Last Answer : What is the salivary digestive enzyme? Which type of food does it digest and into which smaller molecules does it transform the food?

Assertion `:` Products of digestion are absorbed in the small intestine. Reason `:` Large intestine has impermeable wall.

Description : Assertion `:` Products of digestion are absorbed in the small intestine. Reason `:` Large intestine has impermeable wall.

Last Answer : Assertion `:` Products of digestion are absorbed in the small intestine. Reason `:` Large intestine has ... D. If both Assertion & Reason are false.

After digestion the next step is absorption done by cells of the mucous membrane of the intestine. For this task a large absorption surface is an advantage. How is it possible in the small internal space of the body of a pluricellular organism to present a large intestinal surface?

Description : After digestion the next step is absorption done by cells of the mucous membrane of the intestine. For this task a large absorption surface is an advantage. How is it possible in the small internal space of the body of a pluricellular organism to present a large intestinal surface?

Last Answer : Evolution tried to solve this problem in two ways. The simplest is the long and tubular shape of the bowels (approximately eight meters in extension), making possible that numerous ... function of increasing the absorption surface too. Digestion System - Image Diversity: intestinal villi microvilli

What is the substance produced in the liver that acts in the small intestine during digestion?

Description : What is the substance produced in the liver that acts in the small intestine during digestion?

Last Answer : How does that substance act in the digestive process?

The digestive system, also known as “systema digestorium”, or gastrointestinal system, is composed of the digestive tube organs plus the digestive adnexal glands. The digestive tube is composed of mouth, pharynx, esophagus, stomach, small intestine (duodenum, jejunum, ileum), large intestine (caecum, colon, rectum) and anus. Digestion System - Image Diversity: human digestive system

Description : The digestive system, also known as systema digestorium , or gastrointestinal system, is composed of the digestive tube organs plus the digestive adnexal glands. The digestive tube is composed of mouth ... (caecum, colon, rectum) and anus. Digestion System - Image Diversity: human digestive system

Last Answer : What are peristaltic movements? What is their role in human digestion?

The site where complete digestion of carbohydrates, proteins and fats takes place is called – (1) Liver (2) Stomach (3) Large Intestine (4) Small Intestine

Description : The site where complete digestion of carbohydrates, proteins and fats takes place is called – (1) Liver (2) Stomach (3) Large Intestine (4) Small Intestine

Last Answer : (4) Small Intestine Explanation: The small intestine is the site of the complete digestion of carbohydrates, proteins and fats. It receives the secretions of the liver and pancreas for this purpose.

Digestion of food is completed in the -----? A. small intestine (Answer) B. large intestine C. stomach D. Liver

Description : Digestion of food is completed in the -----? A. small intestine (Answer) B. large intestine C. stomach D. Liver

Last Answer : A. small intestine (Answer)

Which one of the following statements is true regarding digestion and absorption of food in humans? (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+. (b) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries. (c) About 60% of starch is hydrolysed by salivary amylase in our mouth. (d) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

Description : Which one of the following statements is true regarding digestion and absorption of food in humans? (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions ... amylase in our mouth. (d) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

Last Answer : (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na

Most of the fat digestion occurs in (a) rectum (b) stomach (c) duodenum (d) small intestine.

Description : Most of the fat digestion occurs in (a) rectum (b) stomach (c) duodenum (d) small intestine.

Last Answer : (d) small intestine.

Intestinal villi are numerous and larger in posterior part of small intestine because (a) Digestion is faster in posterior part (b) Blood supply is poor in anterior part (c) Blood supply is poor in posterior part. (d) There is more digested food in posterior part

Description : Intestinal villi are numerous and larger in posterior part of small intestine because (a) Digestion is faster in posterior part (b) Blood supply is poor in anterior part (c) Blood supply is poor in posterior part. (d) There is more digested food in posterior part

Last Answer : (d) There is more digested food in posterior part

Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in (A) Blood (B) Saliva (C) Intestine (D) Gland

Description : Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in (A) Blood (B) Saliva (C) Intestine (D) Gland

Last Answer : (B) Saliva

Why Digestion does not occur in large intestine?

Description : Why Digestion does not occur in large intestine?

Last Answer : Digestion does occur in the large intestine. Digestion occurseverywhere between lips and anus. The digestion in the colon mainlyconcerns the osmotic movement of water.

After digestion amino acids (A) Are absorbed into portal circulation (B) Are absorbed into lymph (C) Are excreted to the extent of 50% (D) Converted into glucose in the intestine

Description : After digestion amino acids (A) Are absorbed into portal circulation (B) Are absorbed into lymph (C) Are excreted to the extent of 50% (D) Converted into glucose in the intestine

Last Answer : Answer : A

Surgical removal of Gall bladder in man would lead to (a) lmpairment of digestion of fat (b) Jaundice (c) Increased acidity in intestine {d) None of the above

Description : Surgical removal of Gall bladder in man would lead to (a) lmpairment of digestion of fat (b) Jaundice (c) Increased acidity in intestine {d) None of the above

Last Answer : (a) lmpairment of digestion of fat

Fat digestion takes place in (a) Buccal cavity (b) Stomach (c) Intestine (d) All

Description : Fat digestion takes place in (a) Buccal cavity (b) Stomach (c) Intestine (d) All

Last Answer : (c) Intestine

Carbohydrate digestion in man starts from (a) Buccal cavity (b) Oesophagus (c) Stomach (d) Intestine

Description : Carbohydrate digestion in man starts from (a) Buccal cavity (b) Oesophagus (c) Stomach (d) Intestine

Last Answer : (a) Buccal cavity

Protein digestion start from (a) Buccal cavity (b) Stomach (c) Intestine (d) None

Description : Protein digestion start from (a) Buccal cavity (b) Stomach (c) Intestine (d) None

Last Answer : (b) Stomach

The role of the M cell is toA- .trap virus in mucus and prevent entry B- induce apoptosis in virus-infected small intestinal epithelia cells C- pass bacteria or virus to underlying macrophages for processing and presentation of antigen D- they use their cilia to propel mucus out of the small intestine

Description : The role of the M cell is to A- .trap virus in mucus and prevent entry B- induce apoptosis in virus-infected small intestinal epithelia cells C- pass bacteria or virus to underlying macrophages for ... and presentation of antigen D- they use their cilia to propel mucus out of the small intestine

Last Answer : pass bacteria or virus to underlying macrophages for processing and presentation of antigen

Describe the role of stomach in digestion of food?

Description : Describe the role of stomach in digestion of food? 

Last Answer : i) Stomach is thick muscular organ. ii) Its inner surface has gastric glands which secret a juice called gastric juice. iii) Human stomach secret about 1-2 liter juice daily. iv) Gastric juice ... changed it into thick liquid called chyme. ix) Then this chyme is pushed to small intestine.   

In humans structure that release digestive secretions directly into the small intestine include both th?

Description : In humans structure that release digestive secretions directly into the small intestine include both th?

Last Answer : Need answer

What is saliva? State its role in the digestion of food -Biology

Description : What is saliva? State its role in the digestion of food -Biology

Last Answer : Saliva is a watery fluid secreted by the salivary glands in the mouth. The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin.

What is the role of saliva in the digestion of food? -Biology

Description : What is the role of saliva in the digestion of food? -Biology

Last Answer : When we eat something we like, our mouth ‘waters’. This is actually not only water, but also a fluid called saliva secreted by the salivary glands. Another aspect of the food we ... The food is mixed thoroughly with saliva and moved around the mouth while chewing by the muscular tongue.

What is the role of saliva in the digestion of food ? -Biology

Description : What is the role of saliva in the digestion of food ? -Biology

Last Answer : aliva contains salivary amylase enzyme that breaks down starch into sugars like maltose. Saliva keeps the mouth cavity clean and moistens the food that help in chewing and breaking down the big pieces of food into smaller ones.

In mammals, an important role of excretion is played by – (1) Large intestine (2) Kidneys (3) Lungs (4) Liver

Description : In mammals, an important role of excretion is played by – (1) Large intestine (2) Kidneys (3) Lungs (4) Liver

Last Answer : (2) Kidneys Explanation: The kidneys are bean-shaped organs that serve several excretory roles apart from the essential regulatory roles in mammals. They remove from the blood the nitrogenous wastes ... of urine. In producing urine, the kidneys excrete nitrogenous wastes such as urea and ammonium.

In mammals, an important role of excretion is played by – (1) Large intestine (2) Kidneye (3) Lungs (4) Liver

Description : In mammals, an important role of excretion is played by – (1) Large intestine (2) Kidneye (3) Lungs (4) Liver

Last Answer : (2) Kidneye Explanation: The Kidneys are bean-shaped organs that serve several excretory roles apart from the essential regulatory roles in mammals.

In mammals, an important role of excretion is played by (1) Large intestine (2) Kidneys (3) Lungs (4) Liver

Description : In mammals, an important role of excretion is played by (1) Large intestine (2) Kidneys (3) Lungs (4) Liver

Last Answer : Kidneys

How is the small intestine designed to absorb digested food ? -Biology

Description : How is the small intestine designed to absorb digested food ? -Biology

Last Answer : The small intestine is designed to provide maximum area for absorption of digested food and its transfer into the blood for its circulation into the body. For this the inner lining of the small ... supplied with blood vessels which take the absorbed food to each and every cell of the body.

What is the lining of the small intestine made up of? -Biology 9th

Description : What is the lining of the small intestine made up of? -Biology 9th

Last Answer : columnar epithelial tissue

What is the lining of the small intestine made up of? -Biology 9th

Description : What is the lining of the small intestine made up of? -Biology 9th

Last Answer : answer:

Why do herbivores have longer, small intestine than carnivores ? -Biology

Description : Why do herbivores have longer, small intestine than carnivores ? -Biology

Last Answer : Digestion of cellulose takes a longer time. Hence, herbivores eating grass need a longer small intestine to allow complete digestion of cellulose. Carnivorous animals cannot digest cellulose due to the absence of enzyme CELLULASE, hence they have a shorter intestine.

What are the regions of the small intestine? -Biology

Description : What are the regions of the small intestine? -Biology

Last Answer : answer:

How are the small intestine and large intestine related to the function of absorption? -Biology

Description : How are the small intestine and large intestine related to the function of absorption? -Biology

Last Answer : answer:

why should the stomach need such an extreme PH level while the small intestine do not? -Biology

Description : why should the stomach need such an extreme PH level while the small intestine do not? -Biology

Last Answer : answer:

Mention the role of teeth in digestion. ?

Description : Mention the role of teeth in digestion. ?

Last Answer : : The sugary food is cut and greased with the help of teeth in the mouth and the food is soft and slippery with the help of mucin secreted from the red glands. The sugar- ... maltose into two molecules of glucose. Lysozyme The antiseptic enzyme lysozyme present in saliva kills various germs.

In mammals a significant initial role in the digestion of milk is played by

Description : In mammals a significant initial role in the digestion of milk is played by

Last Answer : In mammals a significant initial role in the digestion of milk is played by A. Rennin B. Invertase C. Amylase D. Intestinal bacteria

Role of biotechnology in the production of food based on ------? A. Decomposition B. Respiration C. Digestion D. Fermentation (Answer) E. None of these

Description : Role of biotechnology in the production of food based on ------? A. Decomposition B. Respiration C. Digestion D. Fermentation (Answer) E. None of these

Last Answer : D. Fermentation (Answer)

The main role of bacteria in the carbon cycle involves (a) chemosynthesis (b) digestion or breakdown of organic compounds (c) photosynthesis (d) assimilation of nitrogenous compounds.

Description : The main role of bacteria in the carbon cycle involves (a) chemosynthesis (b) digestion or breakdown of organic compounds (c) photosynthesis (d) assimilation of nitrogenous compounds.

Last Answer : (b) digestion or breakdown of organic compounds

The main role of bacteria in the carbon cycle involves (a) chemosynthesis (b) digestion or breakdown of organic compounds (c) photosynthesis (d) assimilation of nitrogenous compounds.

Description : The main role of bacteria in the carbon cycle involves (a) chemosynthesis (b) digestion or breakdown of organic compounds (c) photosynthesis (d) assimilation of nitrogenous compounds.

Last Answer : (b) digestion or breakdown of organic compounds

How does the structure of the smail intestine help absorption?

Description : How does the structure of the smail intestine help absorption?

Last Answer : They all

Describe the processes involved in mechanical digestion. -Biology

Description : Describe the processes involved in mechanical digestion. -Biology

Last Answer : answer:

Carbohydrate digestion occurs first in which structure ?

Description : Carbohydrate digestion occurs first in which structure ?

Last Answer : Carbohydrate digestion occurs first in which structure ? A. mouth B. intestine C. Stomach D. none of these

On which organelle of the cell structure does intracellular digestion depends ?

Description : On which organelle of the cell structure does intracellular digestion depends ?

Last Answer : What is the chemical content of those organelles? Intracellular digestion occurs by the action of lysosomes. Lysosomes have digestive enzymes (hydrolases) that are made in the rough endoplasmic ... apparatus. Lysosomes are hydrolase-containing vesicles that detach from the Golgi apparatus.

Digestion of proteins involves (a) changes in secondary structure only (b) cleavage of peptide linkages (c) removal of all carboxyl groups in the form of CO2. (d) removal of all NH2 groups in the form of NH3

Description : Digestion of proteins involves (a) changes in secondary structure only (b) cleavage of peptide linkages (c) removal of all carboxyl groups in the form of CO2. (d) removal of all NH2 groups in the form of NH3

Last Answer : cleavage of peptide linkages

Digestion of protein-is necessary because (a)It not absorbed as such (b)Proteins are large molecules. (c) Proteins have complex structure. (d) Proteins are made of amino acids

Description : Digestion of protein-is necessary because (a)It not absorbed as such (b)Proteins are large molecules. (c) Proteins have complex structure. (d) Proteins are made of amino acids

Last Answer : (a)It not absorbed as such

Which of the following structure-function pairs is mismatched? (A) Lysosome-intracellular digestion (B) Golgi body-secretion of cell products (C) Ribosome-protein synthesis (D) Glyoxysome-detoxification

Description : Which of the following structure-function pairs is mismatched? (A) Lysosome-intracellular digestion (B) Golgi body-secretion of cell products (C) Ribosome-protein synthesis (D) Glyoxysome-detoxification

Last Answer : (D) Glyoxysome-detoxification

Describe organizational structure, role and justification of motor vehicle insurance organizational in India.

Description : Describe organizational structure, role and justification of motor vehicle insurance organizational in India. 

Last Answer : Organizational structure:- Section 4 of the IRDAI act 1999 specifies the authority composition. It is a ten member body consisting of : a) Chairmen (Subhash.C.Khuntia from 1st SEP ) b) ... . 7. To advise insurer and insured about loss minimization, control loss for security and safety devise.