Chemical Digestion - Class Starter Quiz

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1. Which organs chemically breakdown food in the digestive system?

• Mouth, stomach and oesophagus
• Mouth, stomach and small intestine
• Stomach and small intestine only
• Mouth and stomach only

2. Which of the following is a form of chemical digestion in the stomach?

• The breakdown of carbohydrates by salivary amylase
• The breakdown of protein by pepsin
• The process of peristalsis in the stomach
• The churning of smooth muscle

3. Which of the following is an example of chemical digestion?

• The teeth macerating food
• The tongue forming a bolus
• Smooth muscle churning in the stomach
• Salivary amylase breaking down carbohydrates

4. Chemical digestion always involves the use of___________?

• salts
• teeth
• enzymes
• oxygen

5. Enzymes are:

• catalysts that speed up reactions
• catalysts that slow down reactions
• catalysts that do not affect the rate of reaction
• only involved in mechanical digestion

6. Enzymes are affected by.........

• levels of vitamins and minerals
• toxins
• temperature and pH
• all of the above

7. Releases salivary amylase into mouth which helps break down carbs.

• stomach
• salivary glands
• oesophagus
• epiglottis

8. Which enzymes digest proteins?

• pepsin
• lipase
• amylase
• protease