AP BIOLOGY

Detailed explanation-1: -True. Ingestion: The process where food is taken in through the mouth and broken down by teeth and saliva. It is the first step in the process of nutrition.

Detailed explanation-2: -Ingestion: The first step of nutrition is ingestion or the intake of food. The ingestion of food takes place through the mouth. Digestion: Ingested food is digested with the help of digestive enzymes present in the alimentary canal.

Detailed explanation-3: -Mouth. The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food.

Detailed explanation-4: -Solution 1: (a) The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion.

Detailed explanation-5: -Digestive Processes The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth.