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Questions and Answers
Which two anatomical parts is the stomach divided into?
Which two anatomical parts is the stomach divided into?
- The body and the antrum (correct)
- The body and the fundus
- The fundus and the antrum
- The antrum and the pylorus
During the storage of food in the stomach, which reflex reduces the tone in the muscular wall?
During the storage of food in the stomach, which reflex reduces the tone in the muscular wall?
- Vagovagal reflex (correct)
- Enterogastric reflex
- Gastrocolic reflex
- Duodenal reflex
Which portion of the stomach does the first two thirds of the body belong to physiologically?
Which portion of the stomach does the first two thirds of the body belong to physiologically?
- Fundic portion
- Orad portion (correct)
- Caudad portion
- Cardiac portion
What is the maximum amount of food the completely relaxed stomach can accommodate?
What is the maximum amount of food the completely relaxed stomach can accommodate?
Which of the following is NOT a motor function of the stomach?
Which of the following is NOT a motor function of the stomach?
Which physiological portion of the stomach includes the remainder of the body plus the antrum?
Which physiological portion of the stomach includes the remainder of the body plus the antrum?
What is the semifluid mixture formed in the stomach called?
What is the semifluid mixture formed in the stomach called?
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Study Notes
Anatomical Parts of the Stomach
- The stomach is divided into two major parts: the body and the antrum.
- Physiologically, the stomach is divided into the orad portion (first two-thirds of the body) and the caudad portion (remainder of the body plus the antrum).
Storage Function of the Stomach
- When food stretches the stomach, a vagovagal reflex occurs, reducing the tone in the muscular wall of the body of the stomach.
- As a result, the wall bulges outward, accommodating greater quantities of food up to a limit of 0.8 to 1.5 liters in the completely relaxed stomach.
- The pressure in the stomach remains low until this limit is approached.
Motor Functions of the Stomach
- The stomach has two motor functions: storage of food and mixing food.
- The stomach stores large quantities of food until it can be processed in the stomach, duodenum, and lower intestinal tract.
- The stomach mixes food with gastric secretions to form a semifluid mixture called chyme.
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