A carbohydrate splitting enzyme is secreted by -

Which structure helps to prevent a bolus of food from entering the trachea during deglutition (swallowing)?

Rationale: The epiglottis is a flap of cartilage that covers the trachea during swallowing, preventing food from entering the airway.

The glomerular capillaries are where?

Rationale: Glomerular capillaries are in Bowman's capsule, where filtration occurs.

Peyer's patches produce-

Rationale: Peyer's patches in the small intestine produce lymphocytes, which are part of the immune system.

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.

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.

Digestive System Mcq Questions