Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth.
Butter is a fat product and gets digested in the small intestine. The bile juice secreted by the liver contains bile salts that break down large fat globules into smaller globules, so as to increase their surface area for the action of lipase. This process is referred to as emulsification of fats.
After this, the pancreatic lipase present in the pancreatic juice and the intestinal lipase present in the intestinal juice hydrolyse the fat molecules into triglycerides, diglycerides, monoglycerides, and ultimately into glycerol.
Absorption of fats:
Fat absorption is an active process. During fat digestion, fats are hydrolysed into fatty acids and glycerol. However, since these are water insoluble, they cannot be directly absorbed by the blood. Hence, they are first incorporated into small droplets called micelles and then transported into the villi of the intestinal mucosa.
They are then reformed into small microscopic particles called chylomicrons, which are small, protein-coated fat globules. These chylomicrons are transported to the lymph vessels in the villi. From the lymph vessels, the absorbed food is finally released into the blood stream and from the blood stream, to each and every cell of the body.
Explain the functions of Liver ?
Functions of Liver :
1. Secretion of bile : The hepatic cells secrete bile.
2. Glycogenesis : The cells of liver store glycogen. Excess amount of glucose is converted into glycogen. The process is called glycogenesis. It occurs with the help of hormone called insulin.
When there is need of glucose, then glycogen is coverted into glucose. This process is called glycogenolysis. It occurs in the presence of glucagon.
3. Deamination : Liver converts excess of amino acids into ammonia. This process is called deamination.
4. Detoxification : Liver converts toxic NH3 into urea which is less harmful.
5. Storage of salts of Fe and Cu : Liver stores salts of Fe and Cu.
6. Manufacture of R.B.C. : Liver manfactures R.B.C. only in embryo.
7. Manufacture of fibrinogens : Liver manfactures fibrinogens which help in blood clotting.
8. Manufacture of Heparin : The liver manufactures haparin which checks clotting in body.
9. Generation of energy : Liver generates energy.
10. Phagocytosis : The Kupffer’s cells engulf foreign bacteria and protect body from diseases.
11. Relief to heart : Liver eliminates excess of material like glucose and amino acids from food and thus provides relief to heart, otherwise heart has to circulate them also.
Role of pancreatic juice in digestion of proteins.
The pancreatic juice contains inactive enzymes – trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases.
i. Proteins, proteoses and peptones in the chyme reaching the intestine are acted upon by the proteolytic enzymes of pancreatic juice.
ii. Carbohydrates in the chyme are hydrolysed by pancreatic amylase into disaccharides.
iii. Fats are broken down by lipases
iv. Nucleases in the pancreatic juice acts on nucleic acids to form nucleotides and nucleosides.