Question

Large intestine in man mainly carries out
A. Absorption
B. Assimilation
C. Digestion of fats
D. Digestion of carbohydrates

Answer 1

The large intestine is the most responsible component of the digestive system for the absorption of water from indigestible food residues. Material is transferred into the large intestine at the cecum through the ileocecal valve of the ileum (small intestine). The material moves through the colon's ascending, transverse, descending, and sigmoid sections, and into the rectum at last. The waste is expelled out of the body from the rectum.

Complete answer:
The large intestine is the final part of the gastrointestinal tract that when transforming digested food into feces, performs the essential task of absorbing water and vitamins.

While shorter in length than the tiny intestine, the large intestine is slightly thicker in diameter, giving it its name. Enzymes from the small intestine complete the digestive process in the proximal, or upper, half of the large intestine and bacteria develop B vitamins as well as vitamin K. However, absorption of water and electrolytes from intestinal residues and preservation of fecal matter until it can be expelled is the primary feature of the large intestine. The large intestine's churning motions gradually expose the absorbing walls to the digestive residue.

The substance is driven toward the anus by a progressive and more intense form of movement known as the gastrocolic reflex, which happens just two to three times daily. Inflammation, such as colitis, diverticulosis, and irregular growths (such as benign or malignant tumors) are common issues related to the large intestine.

Hence, the correct answer is (A).

Note:
Ulcerative colitis, inflammation of the large intestine (colon) and in particular, of its mucous membranes, is characterized by tiny ulcer patches in the inflamed membranes. Bloody diarrhea and stomach pain are the most common signs of ulcerative colitis. Other signs include tiredness, loss of weight, and loss of appetite. Ulcerative colitis, with sustained fever and weight loss, tends to become chronic; complications and death can result.