BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Gastric activity involved in digestion is divided into three phases of digestion known as the cephalic phase, the gastric phase, and the intestinal phase. These phases overlap and all three can occur simultaneously.

Detailed explanation-2: -There are three overlapping phases of gastric control-the cephalic phase, the gastric phase, and the intestinal phase-each requires many enzymes and is under neural control as well.

Detailed explanation-3: -The digestive processes are ingestion, propulsion, mechanical digestion, chemical digestion, absorption, and defecation.

Detailed explanation-4: -There are four stages in the digestive process: intake, chemical and mechanical degradation of food, nutrients’ absorption, and removal of indigestible food. Mechanical degradation of food is done by mouth, while chemical degradation is performed by stomach.