10 Questions
Which tissue layer of the digestive tract is continuous with the external environment?
Lumen
Which enzyme is present in saliva for carbohydrate digestion?
Amylase
Where does most absorption occur in the digestive system?
Small intestine
Which sphincter is normally closed to prevent air from entering the esophagus?
Pharyngoesophageal sphincter
Which component of saliva acts as a bicarbonate buffer?
Mucus
Which layer of the digestive tract consists of smooth muscle and the enteric nervous system?
Submucose
What is the main function of the upper sphincter (pharyngoesophageal sphincter)?
Preventing air from entering the esophagus
Which component of saliva plays a role in protecting the oral cavity from microorganisms?
Lysozyme
What is the primary function of the muscularis externa in the digestive tract?
Mixing movements to aid digestion and absorption
Which part of the digestive system serves as a common passageway for both the digestive and respiratory systems?
Pharynx
Test your knowledge of the digestive tract from mouth to anus with this quiz. Explore the 4 major tissue layers and the functions of the lumen, mucosa, submucosa, serosa, and muscularis externa. Dive into the role of the enteric nervous system and the basic digestive processes of motility, secretion, absorption, and digestion.
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