Structures called _____ regulate the flow of material through the GI tract

Question

Quizplus · Accepted Answer

Sphincters are specialized muscles located at various points along the GI tract that regulate the flow of material by contracting and relaxing to allow or block the movement of food and waste. Enzymes, hormones, and buffers also play important roles in the digestive process, but they do not regulate the flow of material in the same way that sphincters do.

Structures Called _____ Regulate the Flow of Material Through the GI