NEET BIOLOGY

Detailed explanation-1: -Colon: This is the major section of the large intestine; you may have heard people talk about the colon on its own. The colon is also the principal place for water reabsorption, and absorbs salts when needed.

Detailed explanation-2: -Any remaining water and electrolytes are absorbed in the ascending and transverse colon so that the food waste that arrives in the descending colon is mostly solid. The colon secretes mucus to bind and lubricate the food waste to help it pass through smoothly as it is dehydrated.

Detailed explanation-3: -In the colon potassium may be absorbed or secreted depending on the remaining concentration in the lumen and the electrochemical gradient created by the active absorption of sodium. Secretion usually occurs when the luminal concentration of potassium ions is below 25mM.

Detailed explanation-4: -The large intestine absorbs water and changes the waste from liquid into stool. Peristalsis helps move the stool into your rectum.