Digestive System Anatomy
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Questions and Answers

What is the function of the lower esophageal sphincter in the digestive system?

  • To control the exit of food from the stomach
  • To control the entrance of food into the stomach (correct)
  • To absorb nutrients from food
  • To mix food with digestive enzymes

What is the longest part of the digestive system?

  • Stomach
  • Esophagus
  • Large intestine
  • Small intestine (correct)

What is the functional unit of absorption of food in the small intestine?

  • Mucosa
  • Microvilli
  • Fingerlike projections
  • Villi (correct)

What is the primary function of the large intestine?

<p>To absorb water from undigested food (C)</p> Signup and view all the answers

What is the process by which feces are carried to the rectum?

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

What is the final point of exit for waste products in the digestive system?

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

What is the primary function of the esophagus?

<p>To pass food from the pharynx to the stomach (A)</p> Signup and view all the answers

What is the role of hydrochloric acid in the stomach?

<p>To mix with food and aid in the chemical digestive process (B)</p> Signup and view all the answers

What is the term for the involuntary muscle contractions that move food through the digestive tract?

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

Where is the stomach located in the body?

<p>Upper left quadrant of the abdominal cavity (D)</p> Signup and view all the answers

What is the function of the rugae in the stomach?

<p>To contain gastric glands that secrete gastric juice and HCl (B)</p> Signup and view all the answers

What is the role of pepsinogen in the stomach?

<p>To break down proteins into amino acids (A)</p> Signup and view all the answers

What is the primary function of the villi in the small intestine?

<p>Absorption of nutrients into the bloodstream (D)</p> Signup and view all the answers

Which layer of the digestive tract contains blood vessels, lymphatic vessels, and nerves?

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

What is the process by which the body eliminates waste products from the digestive system?

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

What is the main function of the salivary glands in the digestive system?

<p>Secretion of saliva into the oral cavity (B)</p> Signup and view all the answers

What is the outermost layer of the digestive tract composed of?

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

What is the process by which food molecules are broken down into smaller parts that can be absorbed by the body?

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

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