Review 6.1-6.2

During digestion of lipids large fat droplets are broken down into smaller fat droplets by a process called______ which is facilitated by bile salts. The enzyme__________ hen breaks the lipids down into monoglycerides, which can be absorbed into the lacteal.

Which of the following accurately shows where nutrients are absorbed into within the villi?

• I

• II

• III

• IV

Which of the following is correct for the location of the breakdown of nutrients in the digestive system?

• I

• II

• III

• IV

Bile contains bile salts that are able to break large fat droplets into smaller fat droplets. This process is called:_________

In the small intestine, bile emulsifies fats into small droplets, and then…

• lactase digests triglycerides into monoglycerides and fatty acids.

• lipase digests triglycerides into monoglycerides and fatty acids.

• lipase digests triglycerides into amino acids and fatty acids.

• lactase digests triglycerides into amino acids and fatty acids.

Which structures would you expect to find in or on the villi?

I. goblet cells

II. lacteals

III. capillaries

• I and II

• I and III

• I, II and III

• II and III

Dialysis tubing, also known as Visking tubing, can be used to model the absorption of digested food in the small intestine. What feature of dialysis tubing makes it suitable as a model for this process?

• full permeability of the membrane

• impermeability of the membrane

• ion-permeability of the membrane

• semi-permeability of the membrane

Celiac disease is an immune disease that mainly affects the walls of the small intestine. It is characterised by shortening of the villi lining the small intestine, and frequently leads to iron-deficiency anemia. What could be possible consequences of celiac disease?

• decrease in the rate of nutrient absorption

• decrease in protein digestion

• decrease in the metabolic rate

• decrease in peristaltic movements

Which enzymes are secreted by the pancreas into the small intestine?

• amylase, maltase and lipase

• protease, amylase and lipase

• lactase, amylase and protease

• pepsin, amylase and lipase

The wall of the small intestine is made up of several layers of tissues. Which tissue layer has villi?

• mucosa

• muscle layers

• serosa

• sub-mucosa