Bilirubin and biliverdin are formed in-

Which enzyme works in highly acidic pH

Rationale: Pepsin functions optimally in the highly acidic pH of the stomach (around 1.8-2).

Peptide hormones are made of protein and are water soluble. They can therefore:

A. Pass straight through the lipid bilayer and react with other molecules inside the cell
B. React to a specific binding site on the outside of the membrane and create a secondary response
C. Pass through a protein channel to the inside of the cell and then react with other molecules inside the cell
D. Don't react with anything on the membrane or in the cell but cause their effect by other processes

Rationale: Peptide hormones bind to membrane receptors, triggering secondary messengers inside the cell.

Secretion of enterogastrone would be stimulated by the presence of:

Rationale: Enterogastrone secretion is triggered by fats in the small intestine to slow gastric emptying.

Which process involves the use of nutrients inside cells?

Rationale: Assimilation involves the incorporation of absorbed nutrients into the cells for energy production or synthesis of new compounds.

The primary site for absorption of water by the digestive system is the:

Rationale: The colon (large intestine) is the primary site for water absorption, consolidating waste into feces.

Digestive System Mcq Questions