After swallowing the chewed sandwich, the food travels down the esophagus into the stomach. What type of digestion takes place in the stomach?

Question

BlackTom AI · Accepted Answer

Question restatement: After swallowing the chewed sandwich, the food travels down the esophagus into the stomach. What type of digestion takes place in the stomach?

Option a: Mechanical digestion. The stomach does perform mechanical actions, such as muscular contractions that churn and mix the contents, which helps physically break the food into smaller pieces. However, this option describes the physical process rather than the chemical breakdown that actually digests nutrients. So while mechanical activity is present, it does not fully answer what type of digestion occurs in the stomach.

Option b: Chemical digestion. In the stomach, chemical digestion is driven by gastric juice, which contains acid (like hydrochloric acid) and enzymes such as pepsin. This chemical milieu begins breaking down proteins and other components of food, transforming the chewed sandwich into a semi-liquid substance called chyme. This is the primary digestive process occurring in the stomach, making this option the best fit for the question.

Why option a is not correct: Although mechanical actions occur in the stomach, the question asks for the type of digestion, not the physical mixing. Mechanical digestion describes physical breakdown, not chemical transformation of nutrients, so it does not fully address the digestive process occurring there.

Why option b is more accurate: The stomach’s role in digestion is to chemically break down food with gastric juices, which is precisely the definition of chemical digestion. The presence of enzymes and acid directly facilitates the chemical breakdown of proteins and other molecules, which is the core digestive activity in the stomach.

BIO 181 (001&002) FALL 2025 4D - Self-Check: Human Digestive System: Esophagus and Stomach (LO 4D.1, 4D.2, 4D.3, 4D.4)

After swallowing the chewed sandwich, the food travels down the esophagus into the stomach. What type of digestion takes place in the stomach?

查看解析

登录即可查看完整答案

类似问题

___ is the pulpy acidic fluid that passes from the stomach to the small intestine, consisting of gastric juices and partly digested food.

Where does most of digestion take place?

When stomach exocrine secretions are mixed with ingested food particles, small molecules, and water, it forms a solution known as Blank ______.

The process of dissolving and breaking-down macromolecules within the GI tract is referred to as Blank ______.

What is the role of hydrochloric acid in gastric juice?

Question at position 7 Most chemical digestion occurs in the _________.StomachDuodenumLarge intestineIleumJejunum

The chemical and mechanical processes of food breakdown are called ________.

Digestion begins

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单