Stomach Digestion

What is the main function of the stomach in the digestive system?

• To absorb water and nutrients from food

• To break down food and store/mix it before moving to the small intestine

• To produce hormones for digestion

• To regulate body temperature

Which enzyme is responsible for breaking down proteins in the stomach?

• Amylase

• Trypsin

• Pepsin

• Lipase

What is the name of the strong acid found in the stomach?

• Nitric acid (HNO3)

• Acetic acid (CH3COOH)

• Sulfuric acid (H2SO4)

• Hydrochloric acid (HCl)

What is the role of mucus in the stomach lining?

• Mucus is responsible for producing bile in the stomach.

• Mucus helps break down food particles in the stomach lining.

• Mucus acts as a protective barrier against stomach acid and digestive enzymes.

• Mucus absorbs excess stomach acid in the digestive system.

How long does food typically stay in the stomach during digestion?

• 2-4 hours

• 30 minutes

• overnight

• 6-8 hours

What is the name of the muscular contractions that mix food with gastric juices in the stomach?

• Peristalsis

• Digestion

• Excretion

• Absorption

What is the semi-liquid mixture of food and gastric juices called in the stomach?

• Gastricade

• Digesta

• Stomachate

• Chyme

What is the pH level of the stomach acid?

• 1.5 to 3.5

• 2.0 to 4.0

• 3.0 to 5.0

• 4.5 to 6.5

What is the name of the valve that controls the passage of food from the stomach to the small intestine?

• esophageal sphincter

• gastric sphincter

• pyloric sphincter

• duodenal sphincter

What happens to carbohydrates in the stomach during digestion?

• Carbohydrates are stored in the stomach without any change

• Carbohydrates are broken down into simpler sugars like glucose in the stomach.

• Carbohydrates are excreted unchanged from the stomach

• Carbohydrates are converted into proteins in the stomach