18 Questions
Which of the following is NOT a major digestive process?
Respiration
Which layer of the GIT wall is responsible for the secretion of mucus, enzymes, and hormones?
Mucosa
Which of the following is an accessory digestive organ?
Salivary glands
What is the purpose of the digestive processes?
To make food less complex at each step and make nutrients available to the body
What is the function of the propulsion process?
To move food through the alimentary canal
What is the function of the mechanical digestion process?
To increase the surface area of ingested food
What is the main function of the inner circular layer of the muscularis externa?
To form sphincters and prevent food backflow
What is the main component of saliva that helps prevent dental caries?
Bicarbonate buffers
What is the effect of parasympathetic stimulation on salivary glands?
It produces abundant flow of watery saliva
What is the main function of the serosa?
To provide a protective outermost layer of intraperitoneal organs
What is the primary function of the enteric nervous system?
To control GI tract motility
What is the effect of sympathetic stimulation on salivary glands?
It elicits a smaller volume of thick saliva
What is the primary function of the pharynx in the swallowing process?
To voluntarily control the bolus of food
How long does it take for solid food to pass through the oropharynx to the stomach?
8 seconds
What is the function of the pylorus region in the stomach?
To hold 30 ml of chyme and act as a dynamic filter
What is the result of the absence of intrinsic factor in the stomach?
Pernicious anemia
What is the primary function of the stomach in the digestive process?
To secrete gastric juice and churn food
What is a common cause of vomiting or emesis?
Presence of irritants such as bacterial toxins
Review the major digestive processes and functions of the digestive system, including ingestion, breakdown of nutrient molecules, absorption, and elimination of indigestible residue. Learn about the six activities of the digestive system and how they work together to make nutrients available to the body.
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