What are the constituents of gastric juice? List the functions of each of the
components of gastric juice.
Answers
1Hcl- it kills pathogens present in food and also provides acidic medium for pepsin to activate.
2 Pepsin- a protein digestive enzyme that converts proteins into peptons.
3 Mucus- protects the inner lining of stomach from the harmful effect of Hcl.
Hope this will help :)
Answer:
gastric juice, thin, strongly acidic ( p H varying from 1 to 3), almost colorless liquid secreted by the glands in the lining of the stomach. Its essential constituents are the digestive enzymes pepsin and rennin (see rennet ), hydrochloric acid, and mucus. Pepsin converts proteins into simpler, more easily absorbed substances; it is aided in this by hydrochloric acid, which provides the acid environment in which pepsin is most effective. Rennin aids the digestion of milk proteins. Mucus secreted by the gastric glands helps protect the stomach lining from the action of gastric juice. Gastric secretion is stimulated by a number of hormones and chemical substances, by the presence of food in the stomach, and by a number of psychological factors, such as the smell of a favorite food. A decrease or total absence of gastric juice secretion may be a congenital abnormality or a concomitant of advanced age. Certain cells of the stomach lining secrete a substance known as intrinsic factor, which is necessary for the absorption of vitamin B 12; absence of this substance results in pernicious anemia, or B 12 deficiency
GASTRIC JUICES: There are 4 components
present in gastric juices.
(i) HCl (ii) Pepsin (iii) mucus (iv) water
HCl creates acidic environment so that Pepsin
can act upon food. Pepsin breaks down proteins
into peptones.
Mucus covers inner linings of stomach to protect
it from the effect of acid.
Water creates watery medium to make churning
and mixing of gastric juices easy.