Question

Arrange the following structures in the pathway of chyme through the GI tract in the correct order:

1) Cardiac sphincter
2) Stomach
3) Pyloric sphincter
4) Duodenum
5) Rectum


a. 3, 1, 2, 5, 4
b. 3, 5, 2, 1, 4
c. 1, 3, 5, 2, 4
d. 2, 5, 3, 4, 1
e. 1, 2, 3, 4, 5

Answer 1

The pathway of chyme through the GI tract is through the Cardiac sphincter, Stomach, Pyloric sphincter, Duodenum, and finally the Rectum, making the sequence e. 1, 2, 3, 4, 5.

Step-by-step explanation:

The correct order in which chyme travels through the gastrointestinal (GI) tract is: Cardiac sphincter, Stomach, Pyloric sphincter, Duodenum, Rectum. Therefore, the correct sequence is option e. 1, 2, 3, 4, 5. The correct order of the structures in the pathway of chyme through the GI tract is 3) Pyloric sphincter, 1) Cardiac sphincter, 2) Stomach, 5) Rectum, 4) Duodenum. Chyme enters the stomach after passing through the cardiac sphincter (1). Within the stomach (2), chyme is mixed with gastric juices for digestion.

After being processed in the stomach, it then passes through the pyloric sphincter (3), entering the duodenum (4) where it is mixed with bile and pancreatic juices for further digestion and nutrient absorption. Finally, after traversing the entire length of the small intestine and large intestine, the remaining waste material reaches the rectum (5) prior to excretion.