Test: Digestion and Absorption - October 3, 2022 - NEET MCQ

Minerals doesn’t belong to the category of major components of food. Carbohydrates are most required by the body to meet the energy requirements. Proteins are next important for meet growth requirements of the body. Fats are required by the body for insulation of organs as well as to energy requirements in absence of carbohydrates in the diet.

Digestion is the process of conversion of food substrates into digestible form. Excretion is the process of release of undigested and required wastes of the body. Respiration is the process of exchange of O₂ from atmosphere with CO₂ produced by the cells. Circulation is the process of transport of connective tissues blood in the body and the elements it carries.

Stomach is J shaped bag like structure which temporarily stores food. It is divided into Fundus, Cardiac, Body and Pyloric regions. The pyloric region opens into the small intestine via Pyloric sphincter.

The hard chewing surface of the teeth is called enamel. Tongue is the freely movable muscular organ attached to the floor of oral cavity. Frenulum is the organ via with tongue is attached in the oral cavity. Papillae are small projections on the upper surface of tongue.

The major components of our food are carbohydrates, proteins and fats. Vitamins and minerals are also required in small quantities in our diet.

Food is one of the basic requirements of all living organisms. Food provides energy and organic materials for growth and repair of tissues. The water we take in plays an important role in metabolic processes.

This process of conversion of complex food substances to simple absorbable forms is called digestion and is carried is out by our digestive system by mechanical and biochemical methods.

The human digestive system consists of the alimentary canal and the associated glands. The alimentary canal begins with an anterior opening-the mouth, and it opens out posteriorly through the anus.

The mouth leads to the buccal cavity of the alimentary canal. The buccal cavity is also known as the oral cavity. The oral cavity has a number of teeth and a muscular tongue.

In human beings, cusps of teeth are small and blunt. These kid of teeth are called as bunodont teeth. Secodont, selenodont and lophodont teeth are present in carnivores, cattle and elephant respectively.