Human Digestive System

Digested food that is not immediately used by a human body is stored in the liver as glycogen.

This is the correct answer.

This is correct. Peptic ulcers are painful bleeding areas within the stomach and duodenum.

Sucrase is secreted by the tips of the villi of the epithelium in the small intestine. Its levels are reduced in response to villi-blunting events such as celiac sprue and the inflammation associated with the disorder. The levels increase in pregnancy/lactation and diabetes as the villi hypertrophy.

This enzyme belongs to the family of hydrolases, specifically those acting on carboxylic ester bonds. This enzyme participates in bile acid biosynthesis.

The stomach has a priority to destroy the bacteria and viruses using its highly acidic environment but also has a duty to protect its own lining from its acid. The way that the stomach achieves this is by secreting mucin and bicarbonate via its mucous cells, and also by having a rapid cell turn-over.

This is a significant brush border enzyme.This enzyme decreases with age, and as such lactose intolerance is often a common abdominal complaint in the older population, manifesting with bloating, abdominal pain and osmotic diarrhea.

Skatole or 3-methylindole is a mildly toxic white crystalline organic compound belonging to the indole family. It occurs naturally in faeces (it is produced from tryptophan in the mammalian digestive tract), and coal tar, and has a strong faecal odour.

It helps body get rid of undigested food.

Hydaluronidase is the dissolving enzyme of acrosome.

Ribozyme is not a protein enzyme.These are RNA, capable of catalytic activity.

Tobacco naturally contains nicotine, which is a highly addictive stimulant compound. Nicotine is the primary psychoactive ingredient in tobacco products that contributes to addiction.

Digestion begins in the mouth through both mechanical breakdown by teeth and chemical action of salivary amylase enzyme on starches. This is the first stage of the digestive process before food moves to the stomach and intestines.

The small intestine is the primary site of food digestion and nutrient absorption. While digestion begins in the mouth with salivary amylase, most enzymatic breakdown and absorption (90%) of nutrients occurs in the small intestine with help from pancreatic enzymes and bile.

Reproduction is essential for the survival of a species but not for the survival of an individual organism. An individual can live without ever reproducing. Digestion, respiration, and excretion are essential life processes that maintain the individual organism's survival. Without these processes, the individual organism would die quickly.