Question

Cardiac sphincter prevents the movement of food from
a. Oesophagus to mouth
b. Stomach to duodenum
c. Duodenum to large intestine
d. Stomach to oesophagus

Answer 1

Regurgitation is known as the spitting up of the undigested food & gastric juice from the stomach. It can be stated as both voluntary and involuntary. It is more common in infants.

Complete answer:
Regurgitation is generally known as the spitting up of the undigested food along with the gastric juice back to esophagus & mouth.

Esophagus is called the muscular tube by which food passes to reach the stomach. Involuntary regurgitation is usually caused due to the acid reflux and gerd. It can also be called a symptom of the rumination disorder. The backflow of undigested food is then controlled by circular muscles called the sphincters.

Cardiac sphincter is a smooth muscle which is present in between the stomach and the small intestine. It usually prevents the flow of the partially digested food to the small intestine.

Cardiac sphincter is usually present in between the esophagus & the stomach. The esophagus then undergoes the rhythmic perishable movement so that the food can then reach the stomach.

Circular muscle. The circular muscles are present in the tract which normally helps in peristaltic movement of the food.

Hence, the correct answer is option (D).

Additional information:
Vomiting is usually the ejection of the food and other gastric juices from the stomach & the upper intestine.
Pyloric sphincter. It is a smooth muscle which is present in between the stomach and the small intestine. It prevents the flow of the partially digested food to the small intestine.
Muscularis mucosae- It is a thin layer of muscle which is found in the stomach

Note: If the cardiac sphincter does not work properly at all times, the contents from the stomach then starts leaking back to the oesophagus. The gastric acids of the stomach then cause irritation in the oesophagus & can normally lead to heartburn.