Question

Succus entericus is secreted by
A. Peyer’s patches
B. Crypts of Lieberkuhn
C. Auerbach’s plexus
D. Brunner’s glands

Answer 1

Hint: The intestinal secretions are also called as succus entericus. Crypts of Lieberkuhn are intestinal glands which control the enzymatic secretions in the small intestine.

Complete Answer:
Succus entericus also referred to as intestinal juice which is a fluid released in the small intestine in less quantities. Succus entericus is the salty secretion formed via glands in the present in the wall of duodenum, which contains water, carbonate hydrogen ions and mucoproteins. This intestinal juice is produced by the productions of the mucosal brush boundary cells together with the secretions of goblet cells.

Now, let us find the solution from the option.
- Peyer's patches are small masses of lymphatic tissue found throughout the ileum region of the small intestine.
- Succus entericus is produced by the glands of Crypts of Lieberkuhn present in the small intestine. Enzymes of succus entericus react on the partially digested food and turn them into last digestive products. The proteolytic enzymes turn peptides into amino acids. Amylolytic enzymes change disaccharides into 2 molecules of monosaccharides.
- Auerbach’s plexus is a group of ganglia that run throughout the whole gastrointestinal tract and innervate its multiple layers of smooth muscle.
- Brunner's glands are located in the submucosa of the duodenum. They release an alkaline fluid containing mucin, which protects the mucosa from the acidic portion of stomach entering the duodenum.

Thus, the correct option is A.i.e. Crypts of Lieberkuhn.

Note: Crypts of Lieberkuhn tubular glands that lie between the finger-like projections of the inner surface of the small intestine. The cells of intestinal glands which are called Paneth cells produce intestinal juice as they slowly move along the side of the crypt and the villus; at the end they are dropped into the lumen of the intestine.