Anatomy & Physiology Gastrointestinal #1

Question

Which term is used to document the breaking down of food particles into smaller particles and molecules?

Answers

  1. Ingestion
    • Rationale:

      Ingestion is defined as taking fluids and food into the mouth. This term is not used to document the breaking down of food particles into smaller particles and molecules.

  2. Digestion
    • Rationale:

      Digestion is the term used to document the breaking down of food particles into smaller particles and molecules for the absorption of nutrients; therefore, this is the term used for documentation purposes.

  3. Defecation
    • Rationale:

      Defecation is defined as the release of feces from the body. This term is not used to document the breaking down of food particles into smaller particles and molecules

  4. Mastication
    • Rationale:

      Mastication is the process of chewing. This term is not used to document the breaking down of food particles into smaller particles and molecules

Overview

The gastrointestinal (GI) system is responsible for digestion.

Explanation

Learning Outcomes

The GI system (i.e., alimentary canal) is a continuous tube with two openings, the anus and the mouth. The formal definition for digestion is the breakdown of food particles into smaller molecules and particles for absorption of nutrients. This process begins when food enters the mouth (i.e., ingestion) for mastication (i.e., chewing) and ends when waste products are removed from the body via the process of defecation (i.e., the release of feces from the body).

Test Taking Tip

Think about the definition for each term to determine the correct answer choice for this question.

Video Rationale