Which one among the following statements about stomach is not correct ?

The stomach serves as a temporary reservoir for food [t2][t5][t8] and its muscular walls churn and mix food with gastric juice to form chyme [c1][c2][t1]. Gastric juice primarily contains hydrochloric acid, mucus, and the protein-digesting enzyme pepsin [c2][t3]. While the stomach does secrete gastric lipase to aid in triglyceride digestion [t2][t10], it does not secrete amylase. Amylase is primarily secreted by the salivary glands (salivary amylase) and the pancreas (pancreatic amylase) to digest carbohydrates [c4][t4][t8]. Salivary amylase actually becomes inactivated in the stomach due to the highly acidic environment. Furthermore, the rate of gastric emptying is not constant; it depends on the type of food ingested, with factors like fat content, osmolarity, and acidity in the duodenum regulating the process [t1]. Therefore, statement 3 is incorrect as amylase is not a component of gastric juice.

Sources

1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 9: Life Processes in Animals > Stomach > p. 124
2. [2] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.3 > p. 85
3. [3] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Activity 5.3 > p. 86
4. [4] https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/stomach-function
5. [5] https://www.ncbi.nlm.nih.gov/books/NBK279304/
6. [6] https://www.ncbi.nlm.nih.gov/books/NBK544242/