Tag: digestion and absorption

Quizzes (37) Questions (218)

Questions Related to digestion and absorption

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Read the following fours statements (A toD) about chylomicrons?

A. Chylomicrons are produced in the lumen of small intestine
B. Chylomicron contains triglycerides, cholesterol and phospholipids
C. Chylomicron is protein free small vesicles
D. Chylomicron released from the lacteal% into epithelial cells
How many of the above statements are correct?

  1. Four

  2. One

  3. Two

  4. Three
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chylomicrons are lipoprotein particles that consist of triglycerides (85–92%), phospholipids (6–12%), cholesterol (1–3%), and proteins (1–2%).They transport dietary lipids from the intestines to other locations in the body. However, they are not produced in the lumen of the small intestine rather in the epithelial cells of it. The chylomicrons produced in the epithelial cells are released into the lacteals and then get transported into the lymphatic vessels.


So the only correct choice is that chylomicron contains triglycerides, cholesterol and phospholipids . 
So the correct option is 'One'.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Amylopsin and Rennin are carbohydrate and protein digesting enzymes respectively. Amylopsin acts in ____ medium and Rennin acts in ____ medium :-

  1. Acidic only

  2. Alkaline and acidic

  3. Acidic and alkaline

  4. Slightly acidic and acidic
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Amylopsin is a pancreatic enzyme that converts starch to sugar. It is most active in an alkaline pH. Rennin functions best in an acidic environment and loses its activity when pH is higher than 7. So, the correct option is 'Alkaline and acidic'.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Most of the fats absorbed in the small intestine enters the?

  1. Lacteals

  2. Arterioles

  3. Venules

  4. Microvilli
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fats are broken down into fatty acids and glycerol, which are absorbed into the intestinal villi. Because they are large, they enter the lymphatic vessels called lacteals rather than the blood capillaries.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Match the digestive juices with the enzymes given under. Choose the choice which gives the correct combination of the alphabets of the two columns.

   List I (Digestive juices)    List II (Enzymes)
 A  Saliva p  Maltase
 B Gastric juice  q  Trypsinogen
 C  Pancreatic juice r  Ptyalin
 D  Intestinal juice s   Pepsin
    t   Cellulase

  1. A- r, B- s, C- q, D- p

  2. A- s, B- r, C- p, D- t

  3. A- r, B- t, C- p, D- q

  4. A- r, B- s, C- p, D- t
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salivary juice contains starch splitting enzyme amylase. The amylase of saliva is called as ptyalin. Pepsin is the major proteolytic enzyme of stomach. Pepsin is secreted as a proenzyme pepsinogen and is activated to pepsin on exposure to acid in stomach. Trypsin is a component of pancreatic juice where it is present as trypsinogen. Trypsinogen is activated to trypsin on exposure to enterokinase. The intestinal juice contains a number of disaccharidases like maltase, lactase, sucrase for splitting disaccharides into monosaccharides, which can be readily absorbed.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Amount of fat increases in the body due to excess intake of

  1. Vitamins

  2. Minerals

  3. Carbohydrates

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Excess carbohydrates in diet are converted into glycogen and stored in liver and muscles to be used during starvation or in-between meals to maintain a constant blood glucose level. Still excess carbohydrates are converted into adipose tissue of fat and stored around visceral organs and under the skin.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

How many enzymes in the list given below infound in pancreatic juice?
Enterokinase, Chymotrypsin, Aminopeptidase, Pepsin, Lactase, Rennin, Carboxypeptidase, Nuclease, Nucleotidase & Elastase:-

  1. Six

  2. Three

  3. Five

  4. Four
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, nuclease are the enzymes secreted by the pancreas.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Emulsification of fats by bile takes place in  

  1. Duodenum

  2. Liver

  3. Stomach

  4. Intestine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Secretion and synthesis of bile is the main function of liver. Bile is yellowish-green, alkaline fluid. In bile juice, bile salts, sodium carbonate, glycolate, taurocholate, bile pigments, cholesterol, lecithin etc. are present. Bile salts help in emulsification of fats in small intestine. It mainly act at the duodenum part of the small intestine.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Emulsification of fats is due to 

  1. Pepsin

  2. Cholesterol

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bile salts (of bile) plays a very important role in the digestion of fats. As fats are insoluble in water, they enter the intestine as drops within the watery chyme. The bile salts, which are partly lipid-soluble and partly water-soluble, emulsify the fat particles and, as a result, the fat-drops acquire a greater surface area. The enzyme lipase, then acts upon these fat-drops and allows its digestion into glycerol and fatty acids. 

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Glucose is transported to cell by 

  1. ${ Na }^{ + }$ Symport
  2. ${ K }^{ + }$Symport
  3. ${ Na }^{ + }$ Antiport
  4. ${ K }^{ + }$Antiport
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbohydrates are hydrolysed by concerning enzymes and converted into monosaccharides like glucose and fructose. Monosaccharides are absorbed via the capillary blood with in the villus to finally reach into portal vein. Absorption of glucose molecules occurs along with, Na+ by active import. Fructose is absorbed passively through facilitated diffusion.