Classify the statements about the gastrointestinal wall at left according to whe
ID: 3478869 • Letter: C
Question
Classify the statements about the gastrointestinal wall at left according to whether they are true or false True False The venous drainage from the small intestine does not empty directly into the vena cava but passes first to the spleern The gastrointestinal tract has a variety of immune functions, allowing it to produce antibodies and fight infectious organisms. Epithelial cells that line the gastrointestinal tract are incapable of cell division Most of the fat absorbed in the small intestine enters the capillary network within the center of each intestinal villus Enteroendocrine cells are at the base of the villi, and they secrete hormones to The human small intestine's total surface area is control a wide variety roughly the area of gastrointestinal functions. of a tennis court Material absorbed Goblet cells are interspersed within does not reach the the epithelium of the mucosa, and these by the lacteals general circulation exits the body in and instead directlycells secrete mucus to lubricate the wall of the small intestine urineExplanation / Answer
1) Venous drainage from Small intestine: The venous drainage from the stomach, intestine, spleen pancreas, and gall bladder do not enter the inferior vena capa first but enter the hepatic portal vein. The superior mesenteric vein drains blood from small intestine and merges with the splenic vein posterior to the neck of the pancreas to form the hepatic portal vein, draining blood into the liver hepatic system. It does not pass through the spleen.
Option is False.
2) Antibody production by Gastrointestinal tract: The mucosal cells of gastrointestinal tract produce IgA, IgM and IgG antibodies. Lymphoid cells that resemble plasma cells produce the antibodies that are secreted.
Option is True.
3) Epithelial cells of Gastrointestinal Tract: The epithelial cells lining the GI tract are constantly exposed to harsh environmental conditions. Hence, they proliferate and divide continuously to provide new cells.
Option is False.
4) Villi of intestine: The center of each intestinal villus has lacteals, that are blood capillaries and lymph capillaries that carry absorbed fat from the small intestine.
Option is True.
5) Enteroendocrine Cells: Enteroendocrine cells are found in crypts (basal cells) of villi and secrete hormones such as gastric inhibitory polypeptide (GIP: inhibits secretin), Secretin (regulates water homeostasis) and cholesystokinin or CCK (digests fat and protein).
Option is True.
6) Surface area: The surface area of small intestine is roughly 180-300 square meters, roughly half of a badminton court. It is less than a tennis court.
Option is False.
7. Lacteals: Lacteals transports absorbed fat from the small intestine to the blood stream, into the lymphatic plexus in the lamina propria. The materials are not lost through urine.
Option is False.
8. Goblet cells: Goblet cells are present in epithelium of small and large intestine, respiratory tract and conjunctiva. They secret mucus lubricant that protects the epithelium from luminal contents.
Option is True.