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Digestive System Overview

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Questions and Answers

Where does mechanical digestion occur in the human body?

Esophagus

Small intestine

Mouth and stomach (correct)

Large intestine

What is the purpose of digestive enzymes in chemical digestion?

To coat food with saliva

To absorb nutrients into the bloodstream

To break down nutrients into waste

To break down food into smaller molecules (correct)

What is a characteristic of simple digestive systems?

Multiple digestive enzymes for protein breakdown

A long digestive tract with specialized regions

A complex network of blood vessels for nutrient absorption

A single opening for food intake and waste elimination (correct)

What is unique about the human digestive system?

It is a complete digestive system with specialized regions Signup and view all the answers

What is the term for the removal of waste food materials from the body?

Egestion Signup and view all the answers

What is the role of peristalsis in mechanical digestion?

Moving food through the digestive tract Signup and view all the answers

What is the function of the rugae in the stomach?

To aid in churning and allow the stomach to expand Signup and view all the answers

What type of muscle controls the movement of food into and out of the stomach?

Circular muscles Signup and view all the answers

What is the function of the submucosa layer in the stomach?

To connect nerves and blood vessels Signup and view all the answers

What is the hormone that initiates the release of gastric juice in the stomach?

Gastrin Signup and view all the answers

What is the semi-liquid material created by the churning action of the stomach?

Chyme Signup and view all the answers

How many layers does the stomach have?

4 Signup and view all the answers

What is the primary function of the premolars and molars in the mouth?

Grinding and crushing food Signup and view all the answers

What is the primary enzyme found in saliva that aids in chemical digestion?

Amylase Signup and view all the answers

What is the approximate length of the gastrointestinal tract in humans?

7-9 meters Signup and view all the answers

What is the primary function of the salivary glands in the mouth?

Secreting saliva to aid in chemical digestion Signup and view all the answers

What is the term for the process of breaking down food into smaller pieces using teeth?

Mechanical digestion Signup and view all the answers

What is the order of the journey of digestion in the gastrointestinal tract?

Mouth -> Esophagus -> Stomach -> Small Intestine -> Large Intestine Signup and view all the answers