Question

question 10
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which controls the passage of food from the esophagus into the stomach?
the upper esophageal sphincter
the uvula
the lower esophageal sphincter
the muscularis

Explanation:

The lower esophageal sphincter is a ring - shaped muscle located at the junction of the esophagus and the stomach. It relaxes to allow food to pass from the esophagus into the stomach and then contracts to prevent the backflow of stomach contents (such as acid) into the esophagus.
The upper esophageal sphincter is located at the top of the esophagus (near the pharynx) and is involved in the initiation of swallowing.
The uvula is a fleshy, teardrop - shaped structure that hangs from the soft palate and plays a role in speech and preventing food from entering the nasal cavity during swallowing.
The muscularis is a layer of muscle in the walls of organs like the esophagus and stomach (it has inner circular and outer longitudinal muscle layers in the esophagus) but is not a specific structure that controls the passage of food from the esophagus to the stomach.

Answer:

The lower esophageal sphincter