26 Questions
What is the function of the muscularis mucosa in the alimentary canal?
Promotes mechanical digestion
What is the role of the accessory organs in the digestive system?
Help breakdown food
Why is skeletal muscle present at both ends of the alimentary canal?
To control what enters and exits
Which layer of the alimentary canal replenishes itself every 3-7 days?
Mucosa
What is the function of the lamina propria in the alimentary canal?
Contains blood and lymphatic vessels
How does the muscularis aid in digestion in the alimentary canal?
Promotes mechanical digestion
What is the main function of the parietal cells in the stomach?
Secrete intrinsic factor for vitamin B12 absorption
Which hormone is responsible for stopping segmentation in the small intestine and initiating peristalsis?
Motilin
What is the correct sequence of the three phases of gastric secretion?
Cephalic phase, gastric phase, intestinal phase
Which part of the stomach has an additional oblique smooth muscle layer in its muscularis?
Body
Which cell type in the stomach secretes an acidic mucus that is different from mucus produced by goblet cells?
Mucus neck cells
What is the role of microvilli in the small intestine?
Enhance absorption and finish digestion
How often does the stomach produce a mixing wave during digestion?
Every 20 seconds
What causes deactivation of salivary amylase in the stomach?
Acidity in the stomach
What is the purpose of villi in the small intestine?
To increase surface area for absorption
How do circular folds influence absorption in the small intestine?
They increase surface area for absorption.
What is the primary function of the myenteric plexus?
Controlling contractions of the muscularis
Which component of the peritoneum lines the abdominal wall?
Parietal peritoneum
What is the primary function of the uvula?
Preventing food from entering the nasopharynx
Which of the following is NOT a function of the tongue?
Absorption of nutrients
Which salivary gland is responsible for producing the majority of saliva?
Parotid gland
What is the primary function of the pharynx?
Both digestion and respiration
Which of the following is NOT a phase of swallowing (deglutition)?
Gastric phase
What is the primary function of the stomach?
Containing food and initiating digestion
Which of the following statements about the stomach is NOT true?
Its size correlates with body weight
Which of the following is responsible for the sensation of thirst?
Decreased saliva production
Explore the anatomy and function of the digestive system, including the alimentary canal (gastrointestinal tract) and accessory organs. Learn about the divisions of the alimentary canal, its layers, and the role of accessory organs in food breakdown.
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