Anatomy of the Esophagus
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Questions and Answers

What is the major function of the esophagus?

  • Digestion
  • Propulsion (correct)
  • Respiration
  • Filtration

How does the esophagus join the stomach?

  • At the pyloric sphincter
  • At the cardiac sphincter (correct)
  • At the sigmoid colon
  • At the ileocecal valve

Which nerve is primarily involved in the involuntary phase of swallowing?

  • Accessory nerve
  • Facial nerve
  • Vagus nerve (correct)
  • Optic nerve

What prevents food from entering the trachea during swallowing?

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

What type of muscles are present in the esophagus?

<p>Smooth muscles (B)</p> Signup and view all the answers

What is the function of mucus cells around the cardial sphincter?

<p>Protection against acid reflux (C)</p> Signup and view all the answers

What is the main function of the digestive system?

<p>Break down food into nutrient molecules (B)</p> Signup and view all the answers

Which organ is responsible for producing bile?

<p>Gall bladder (B)</p> Signup and view all the answers

What is the primary process of the digestive system?

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

Which part of the digestive system is responsible for absorbing nutrients into the bloodstream?

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

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

<p>Initiate digestion of carbohydrates (B)</p> Signup and view all the answers

Which organ plays a key role in the metabolism of carbohydrates, lipids, and proteins?

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

Which part of the tooth is covered by enamel?

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

What mineralizes the enamel of a tooth?

<p>Calcium salts and hydroxyapatite crystals (A)</p> Signup and view all the answers

Which part of the tooth anchors it in the bony socket?

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

What type of epithelium lines the pharynx?

<p>Stratified squamous epithelium (B)</p> Signup and view all the answers

What are the external muscle layers of the pharynx composed of?

<p>Two skeletal muscle layers (C)</p> Signup and view all the answers

What type of joint is formed by the periodontal ligament?

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

What is the major function of the large intestine?

<p>Reclaiming water and electrolytes (D)</p> Signup and view all the answers

What initiates the mass movements in the large intestine?

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

Which part of the large intestine acts as a storage reservoir for feces?

<p>Sigmoid colon (B)</p> Signup and view all the answers

What kind of movements are mostly observed in the ascending and transverse colon?

<p>Segmenting movements (B)</p> Signup and view all the answers

What does distension initiate in the process of defecation?

<p>Spinal defecation reflex (B)</p> Signup and view all the answers

What is synthesized by enteric bacteria in the large intestine?

<p>B complex vitamins and some vitamin K (D)</p> Signup and view all the answers

What is the main function of intrinsic factor in the stomach?

<p>Facilitating the absorption of vitamin B12 (B)</p> Signup and view all the answers

Which type of anemia is caused by a deficiency of intrinsic factor?

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

What stimulates the secretion of enzymes and hydrochloric acid in the stomach?

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

What triggers the cephalic (reflex) phase of gastric secretions?

<p>Aroma, taste, sight, or thought stimuli (D)</p> Signup and view all the answers

Which phase provides two-thirds of the gastric juice released by the stomach?

<p>Gastric phase (B)</p> Signup and view all the answers

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