Reviewer Science

Which part of the digestive system is the long tube that carries food from the mouth to the stomach?

• Stomach

• Esophagus

• Small intestine

• Large intestine

Where does most of the digestion and absorption of nutrients take place?

• Mouth

• Stomach

• Small intestine

• Large intestine

Why is chewing food in the mouth important for digestion?

• It cools down hot food.

• It makes food taste better.

• It moves food directly to the stomach.

• It breaks food into smaller pieces for easier chemical digestion.

Which of the following is the function of the large intestine?

• Breaks down proteins into amino acids

• Absorbs water from undigested food

• Mixes food with stomach acid

• Starts the digestion of starch

Maria ate a sandwich quickly and did not chew well. Later, she felt discomfort in her stomach. Which step of digestion was likely affected first?

• A. Absorption of nutrients in the small intestine

• B. Proper mixing of food with saliva in the mouth

• C. Water absorption in the large intestine

• D. Peristalsis in the gullet

Maria often experiences stomach discomfort after eating quickly without chewing her food properly. Based on what you know about the process of digestion, what should she do differently to avoid this problem?

• Drink more water after eating

• Chew her food thoroughly to mix it with saliva

• Lie down immediately after meals

• Skip meals to rest her stomach

Which part of the respiratory system serves as the main passageway that carries air from the throat down to the lungs?

• Nose

• Trachea

• Diaphragm

• Bronchioles

Which organ of the respiratory system is responsible for taking in oxygen and releasing carbon dioxide?

• Lungs

• Nose

• Mouth

• Windpipe

What is the main job of the nose in the respiratory system?

• Pumps air into the lungs

• Absorbs nutrients from food

• Stores extra oxygen for the body

• Warms, moistens, and filters incoming air

Why does air move from the nose to the lungs through the windpipe?

• The windpipe connects the nose directly to the lungs.

• The windpipe helps filter the air before it enters the lungs.

• The windpipe serves as a passageway that carries air to the lungs.

• The windpipe controls the amount of air entering the lungs.