Which structure helps to prevent a bolus of food from enteri...

A carbohydrate splitting enzyme is secreted by -

Rationale: Crypts of Lieberkuhn secrete enzymes like maltase that split carbohydrates.

How many nephrons are found in each kidney?

Rationale: Each kidney contains about one million nephrons, the functional units for filtration.

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.

Ptyalin is secreted by and work in medium.

Rationale: Ptyalin (salivary amylase) is secreted by salivary glands and works in a slightly acidic to neutral pH.

Match: Polysaccharide

Rationale: Polysaccharides, such as starch and cellulose, are complex carbohydrates that store energy or provide structural support.

Digestive System Mcq Questions