Nutrition

Which of these require digestion and absorption by the GI tract?

• Carbohydrates

• Calcium

• proteins

• triglycerides

• cholesterol

Answer explanation

cholesterol does not need to be broken down: it is absorbed as is. So is Calcium.

Tags

NGSS.MS-LS1-7

Which of these compounds are carbohydrates?

• Starches

• Cellulose

• glycogen

• sucrose

• lactose

Answer explanation

all of them! they only differ in their number of monosaccharides content. lactose and sucrose are disaccharide while the others are polysaccharides.

Match the the polymers to their monomer content

• glucose

• lactose

• VFA

• cellulose

• glucose and fructose

• protein

• glucose and galactose

• starch

• amino acid

• sucrose

What is the role of the mouth during digestion?

• mastication

• saliva adds moisture to the bolus, which facilitate the next steps

• deglutition

• limited amount of enzymatic digestion

Where does starches start being digested in the GI tract?

• mouth

• stomach

• small intestine

• large intestines

Answer explanation

saliva contains amylase, an enzyme that degrade carbohydrates.

Where does glycogen start being digested in the GI tract?

• mouth

• stomach

• small intestine

• large intestines

Answer explanation

Glycogen is an animal derived carbohydrate. Saliva contains amylase, an enzyme that degrade carbohydrates.

Where does cellulose start being digested in the GI tract of horses?

• mouth

• stomach

• small intestine

• large intestines

Answer explanation

cellulose can only be degraded by microbes by fermentation. In horses, the happens in the hindgut.

Where does proteins start being digested in the GI tract ?

• mouth

• stomach

• small intestine

• large intestines

Answer explanation

Pepsin secreted by the stomach as well as the Hal start the digestion of proteins.

How many amino acids makes up all proteins in animals?

• 5

• 10

• 20

• 30

How many amino acids makes up all proteins in animals?

• 5

• 10

• 20

• 30