Question

The pH of succus entericus is
(a)7.6
(b)6.6
(c)5.6
(d)2.0

Answer 1

Hint: It is a digestive enzyme released by the small intestine and helps in the digestion of various macro nutrients like carbohydrates, fats and proteins. As succus entericus is alkaline in pH, the action of gastric pepsin stops.

Complete step-by-step answer:
Succus entricus average production volume is 2-3 lit/day. It is alkaline in nature and ranges from pH of about 6.9 - 8.

Additional Information: In the mucosa of the small intestine, there are two types of intestinal glands present. They are Crypts of Lieberkuhn and Brunner's glands. Crypts of lieberkuhn secrete enzymes and mucus which it receives from Brunner’s gland. Brunner's gland is present in the submucosa of the small intestine. It secretes alkaline watery, mucoid fluid. It protects the duodenum from the acidity of chyme. It pours secretion in the crypt of Lieberkuhn. These glands of the small intestine secrete intestinal juice/ succus entericus. It composes of many enzymes like aminopeptidase, dipeptidase, intestinal amylase, maltase, isomaltose, limit dextrinase, sucrase, lactase, intestinal lipase, Nucleo phosphatase, nucleosidase(enteropeptidase) which act on all kinds of food. Enterokinase is secreted by the intestinal mucosa.
Digestive enzymes of succus entericus with their functions:

Enzyme	Substrate	End Products
Invertase amylase	Starch	Isomaltase, Maltase
Maltase	Maltose	Glucose
Sucrase	Sucrose	Glucose, Fructose
Aminopeptidase	Peptides	Dipeptides, Amino acids
Dipeptidase	Dipeptides	Amino acids
Intestinal Lipase	Triglycerides, diglycerides, monoglycerides	Fatty acids, Glycerol
Nuclease	Nucleic acid	Nucleotides
Nucleo Phosphates	Nucleotides	Nucleosides, phosphoric acid
Nucleosidase	Nucleosidase	Free nitrogen bases

So the correct answer is ‘ ph 7.6’.
Note: Mucus present in succus entericus helps in prevention from intestinal ulcers. It protects the intestinal wall from acid chyme which arrives from the stomach. It also has an important role in erythropoiesis which is necessary for the absorption of vitamin B12. It is done by Intrinsic factor of the castle present in the small intestine.