Podcast
Questions and Answers
What is the primary function of the digestive system?
What is the primary function of the digestive system?
- Respiratory exchange
- Transfer nutrients/water/electrolytes from food into the body’s internal environment (correct)
- Hormone secretion
- Muscle contraction
Which of the following is NOT one of the four major activities performed by the digestive system?
Which of the following is NOT one of the four major activities performed by the digestive system?
- Motility
- Secretion
- Excretion (correct)
- Absorption
What is the term for the smooth muscle in the walls of the GI tract exerting a steady low level of contraction?
What is the term for the smooth muscle in the walls of the GI tract exerting a steady low level of contraction?
- Relaxation
- Tonality
- Hypertrophy
- Tone (correct)
What function does the maintenance of steady tone in the contents of GIT serve?
What function does the maintenance of steady tone in the contents of GIT serve?
Which activity involves muscular contractions mixing and moving forward the contents of the gastrointestinal tract?
Which activity involves muscular contractions mixing and moving forward the contents of the gastrointestinal tract?
What anatomical features are involved in the swallowing reflex?
What anatomical features are involved in the swallowing reflex?
What determines the rate of propulsion in the propulsive movements of the gastrointestinal tract?
What determines the rate of propulsion in the propulsive movements of the gastrointestinal tract?
Which glands produce aqueous fluid in saliva?
Which glands produce aqueous fluid in saliva?
What is the main purpose of mastication or chewing in digestion?
What is the main purpose of mastication or chewing in digestion?
What is achalasia characterized by?
What is achalasia characterized by?
Which pair of salivary glands are located outside the oral cavity?
Which pair of salivary glands are located outside the oral cavity?
What stimulates the reflex increase in salivary, gastric, and pancreatic secretions?
What stimulates the reflex increase in salivary, gastric, and pancreatic secretions?
Which statement about GI secretions is correct?
Which statement about GI secretions is correct?
What is the composition of lactose?
What is the composition of lactose?
Which layer of the GI tract comprises the thickest muscle layer?
Which layer of the GI tract comprises the thickest muscle layer?
What effect does ACh release have on smooth muscle contraction?
What effect does ACh release have on smooth muscle contraction?
What is the role of the outer longitudinal layer in the gastrointestinal (GI) tract?
What is the role of the outer longitudinal layer in the gastrointestinal (GI) tract?
Which branch of the nervous system decreases motility and secretion in the GI tract?
Which branch of the nervous system decreases motility and secretion in the GI tract?
Which nerve network helps regulate local gut activity by being located between the two muscle layers in the GI tract?
Which nerve network helps regulate local gut activity by being located between the two muscle layers in the GI tract?
How are protein and peptide chains primarily broken down?
How are protein and peptide chains primarily broken down?
What initiates slow-wave potentials in the gastrointestinal (GI) tract?
What initiates slow-wave potentials in the gastrointestinal (GI) tract?
What is the function of VIP (Vasoactive Intestinal Peptide) in smooth muscle cells of the GI tract?
What is the function of VIP (Vasoactive Intestinal Peptide) in smooth muscle cells of the GI tract?
Where are the myenteric and submucosal plexuses located in the gastrointestinal (GI) wall?
Where are the myenteric and submucosal plexuses located in the gastrointestinal (GI) wall?
What are the interstitial cells of Cajal positioned between in the GI tract?
What are the interstitial cells of Cajal positioned between in the GI tract?
What is the purpose of the uvula during swallowing?
What is the purpose of the uvula during swallowing?
Which anatomical structure separates the mouth from the nasal passages?
Which anatomical structure separates the mouth from the nasal passages?
What role do the tonsils play in the pharynx?
What role do the tonsils play in the pharynx?
Which sphincter prevents gastric reflux by closing off the esophagus?
Which sphincter prevents gastric reflux by closing off the esophagus?
What is the main function of the upper esophageal sphincter (UES)?
What is the main function of the upper esophageal sphincter (UES)?
Which anatomical feature is essential for simultaneous breathing and chewing to occur?
Which anatomical feature is essential for simultaneous breathing and chewing to occur?
