Digestion of Carbohydrates and Fiber

How does the complex carbohydrate (starch) change as it moves from the mouth to the small intestine?

• It begins to break down into simpler sugars.

• It stays the same as a large molecule.

• It disappears entirely in the mouth.

• It turns into fats.

Tags

NGSS.MS-LS1-7

How does the structure of fiber compare to starch and glucose?

• Fiber molecules tend to interconnect with other fiber molecules.

• Fiber molecules break down faster than starch and glucose.

• Fiber has a simple structure similar to glucose.

• Fiber forms large clumps, unlike starch and glucose.

What happens to complex carbohydrates in the digestive system?

• They turn into proteins in the large intestine.

• They vanish completely.

• They get absorbed later in the stomach.

• They are broken down and absorbed into the body.

Fill in the blank: In the solid waste of a healthy person, we expect to find mostly _______.

• fiber

• carbohydrates

• vitamins

• glucose

How can we explain why the amount of complex carbohydrates decreases as food travels through the digestive system?

• They are broken down and absorbed as nutrients.

• They dissolve in stomach acid.

• They evaporate.

• They remain undigested and are excreted.

Tags

NGSS.MS-LS1-7

What is the main limitation of our dialysis tube model compared to the small intestine in a real human body?

• The dialysis tube does not have the same selective permeability as the small intestine.

• The dialysis tube is made of a different material than the small intestine.

• The dialysis tube can absorb more molecules than the small intestine.

• The dialysis tube can increase its surface area like the small intestine.

Tags

NGSS.MS-ETS1-1

NGSS.MS-LS1-3

Which food molecules were detected outside of the tube after the investigation?

• Glucose

• Starch

• None

• Starch and glucose

Fill in the blank: A significant observation in M’Kenna’s stomach is that it is ________ and has ridges.

• pale

• darker

• smooth

• the same color

Fill in the blank: M’Kenna’s digestive system shows symptoms of ________ and abnormal structure.

• irritation

• health

• blockage

• ridges

The color of M'Kenna's intestine suggests it is more hydrated.

• True

• False