True about histology of small intestine is A/E
C i.e. GALT is absent in lamina propria- Zone of replication (intestinal stem cell niche) is restricted to lower half of intestinal gland (crypts of Lieberkuhn).- Microfold (M) cells are antigen transpoing cells that convey microorganisms & macromolecules from intestinal lumen to Peyer's patches.- Close entero endocrine cells are resting non secretory cells . Whereas open cells secrete CCK, secretin, GIP, motilin, gastrin & ghrelin hormones.- GALT is prominent in lamina propria of small intestine . Secretory IgA is principle molecule of mucosal immunity
Zone of replication is in lower half of gland
M cells convey microorganism to peyer's patches
GALT is absent in lamina propria
SIgA provides mucosal immunity