Teeth adapted to shear food are:

Which element in the molecule of urea shows that it is formed from amino acids and not from glucose?

Rationale: Nitrogen is a key component of amino acids and is retained in urea during deamination.

is the instant source of energy.

Rationale: Glucose is the body's primary and most immediate source of energy.

Which part of the digestion process speeds up the break down of food?

Rationale: Enzymes are biological catalysts that accelerate the chemical breakdown of food.

What provides the luminal surface of the intestinal wall its characteristics?

Rationale: The luminal surface is smooth and slippery due to mucus secreted by goblet cells in the mucosa, not the peritoneum, which is external.

Posterior part of soft palate, hangs down in pharynx, called-

Rationale: The velum palati (uvula) is the posterior part of the soft palate that hangs down in the pharynx.

Digestive System Practice Questions