Stomach is the site of absorption of
(1) Simple sugars
(2) Water
(3) Alcohol
(4) All of these
Which one of the following statement is false regarding digestion and absorption of food in humans?
1. Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
2. Glucose and amino acids are absorbed with the help of carrier ions like Na+.
3. Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
4. About 30% of starch is hydrolysed by salivary amylase in our mouth.
Most of the water is absorbed in
(1) Small intestine
(2) Large intestine
(3) Stomach
(4) Duodenum
Which statement is correct with reference to chylomicron?
1. They are end products of fat digestion
2. The reconstructed triglycerides in the intestinal cells combine with phospholipids and cholesterol and are released into lymph in the form of protein-coated fat droplets called chylomicrons
3. This is the form in which digested fats are absorbed into intestinal cells
4. These are short chains of fatty acids absorbed directly into blood by diffusion
Which of the following statements is NOT correct?
1. Microvilli increase the surface area of the small intestine for the absorption of nutrients.
2. Enzymes located on the brush border finish the digestion of chyme.
3. Absorption is an active process in the small intestine.
4. Sugars and amino acids cross columnar epithelial cells to enter the lacteal.
Mark the incorrect statement
(1) Fructose, mannose and some amino acids are
absorbed by facilitated diffusion
(2) Various nutrients like amino acids, fatty acid,
monosaccharides like glucose, electrolytes like
are absorbed by active transport only
(3) Fatty acid and glycerol are first incorporated
into small droplets called micelles which move
into intestinal cell of mucosa
(4) Transport of water depends upon osmotic
gradient
Carrier proteins faciliate the absorption of substance like
1. amino acids and glucose
2. glucose and fatty acids
3. fatty acids and glycerol
4. fructose and some amino acids
Chylomicrons are protein-coated small fat globules formed in
1. Lumen of intestine
2. Lacteals of villi
3. Cells of mucosa
4. Blood vessels of villi