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?

<p>It is a complete digestive system with specialized regions (C)</p> Signup and view all the answers

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

<p>Egestion (A)</p> Signup and view all the answers

What is the role of peristalsis in mechanical digestion?

<p>Moving food through the digestive tract (D)</p> Signup and view all the answers

What is the function of the rugae in the stomach?

<p>To aid in churning and allow the stomach to expand (B)</p> Signup and view all the answers

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

<p>Circular muscles (A)</p> Signup and view all the answers

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

<p>To connect nerves and blood vessels (D)</p> Signup and view all the answers

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

<p>Gastrin (C)</p> Signup and view all the answers

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

<p>Chyme (D)</p> Signup and view all the answers

How many layers does the stomach have?

<p>4 (A)</p> Signup and view all the answers

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

<p>Grinding and crushing food (C)</p> Signup and view all the answers

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

<p>Amylase (C)</p> Signup and view all the answers

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

<p>7-9 meters (D)</p> Signup and view all the answers

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

<p>Secreting saliva to aid in chemical digestion (C)</p> Signup and view all the answers

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

<p>Mechanical digestion (B)</p> Signup and view all the answers

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

<p>Mouth -&gt; Esophagus -&gt; Stomach -&gt; Small Intestine -&gt; Large Intestine (D)</p> Signup and view all the answers
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