Digestive System Review REDMAN

A chemical in saliva that breaks down starch is called:

• insulin
• amylase
• bile
• pepsinogen

The acid secreted by the stomach is called:

• nitric acid
• citric acid
• hydrochloric acid
• Sulfuric acid

The most digestion AND absorption takes place in which organ?

• mouth
• esophagus
• small intestine
• liver

What type of digestion takes place in the mouth?

• chemical
• mechanical
• both chemical and mechanical
• incomplete

Bile breaks up (emulsifies) large molecules of:

• lipids (fat)
• starch
• protein
• sugar

All of the following are accessory organs EXCEPT:

• liver
• stomach
• gall bladder
• pancreas
• salivary glands

Which part of the small intestine is responsible for absorption of nutrients into the bloodstream?

• peristalsis
• mucus
• chyme
• villi

Humans like other complex animals, have a:

• open digestive system
• closed digestive system
• complete digestive system (2 openings, 1 direction for food)
• incomplete digestive system (1 opening, 2 directions for food)

What is chemical digestion?

• a type of mechanical digestion
• digestion that involves enzymes
• type of digestion that breaks down food with teeth
• digestion that involves stomach muscles

Why does your small intestine have so many villi?

• decrease surface area for absorption
• decrease the rate of reaction in digestion
• increase the surface area for absorption
• help with digestion