Digestion and absorption

In which organ does the majority of absorption of digested food molecules take place?

Absorption can be defined as the movement of digested food molecules through ______________ to _________?

• the wall of the small intestine into the blood

• The cell wall into the cytoplasm

• The stomach into the liver

• Intestines into the vili

The liver is said to be a digestive gland because it

• converts stored glycogen into glucose

• breaks down excess amino acids

• produces bile

• stores iron

Tiny finger-shaped structures in the small intestine in which absorption occurs

• rectum

• anus

• bile

• villi

Which of these is NOT a function of the digestive system?

• breaks down food

• absorbs nutrients

• eliminates waste

• takes oxygen to body cells

The process of breaking down food into nutrient rich molecules.

• absorption

• digestion

• peristalsis

• villi

Amylase in saliva changes starch into...

• sugar

• waste

• stomach acid

• chyme

What is the enzyme contained in the saliva?

• Amylase

• Pepsin

• Hydrochloride acid

• Lipase

What is the function of the villi?

• To increase the absorption surface

• To digest the last nutrients

• To form feces

• To comb the small intestine

Where nutrients go after the small intestine has absorbed them.

• bloodstream
• stomach
• esophagus
• kidneys