Carbohydrates are comprised of carbon, , and oxygen.

The structure which prevents entry of food into wind pipe during swallowing in mammals is-

Rationale: The epiglottis closes over the glottis during swallowing to prevent food from entering the trachea.

Peptide hormones are made of protein and are water soluble. They can therefore:

A. Pass straight through the lipid bilayer and react with other molecules inside the cell
B. React to a specific binding site on the outside of the membrane and create a secondary response
C. Pass through a protein channel to the inside of the cell and then react with other molecules inside the cell
D. Don't react with anything on the membrane or in the cell but cause their effect by other processes

Rationale: Peptide hormones bind to membrane receptors, triggering secondary messengers inside the cell.

Lipase is the enzyme that catalyses the breakdown of triacylglycerol into:

Rationale: Lipase breaks down triacylglycerols into fatty acids and glycerol, aiding in the digestion and absorption of fats.

A client with an elevated amylase level asks the nurse about the altered value. The nurse bases a response on knowledge that amylase:

Rationale: Amylase, produced by the pancreas, digests carbohydrates into sugars.

The loop of Henle pumps sodium ions from the ascending arm to the descending. What is this called?

Rationale: The countercurrent multiplier in the loop of Henle concentrates urine by moving sodium ions.

Digestive System Mcq Questions