Which movement propels intestinal contents forward toward the anus?

• A. Mixing movements move contents toward the stomach
• B. Propulsive movements push food through the canal and spread it for enzyme mixing
• C. Segmental contractions slow transit
• D. Absorptive movements increase surface area

Answer: (B)

Propulsive movements drive intestinal contents forward toward the anus. This is the peristaltic action, where coordinated waves of contraction push chyme along the tract and help move it to mix with digestive enzymes as it progresses.

Mixing movements, or segmentation, churn and mix the contents to enhance enzyme contact but do not push material forward; they tend to slow net transit. Segmental contractions create isolated segments, aiding digestion rather than propulsion. Absorptive movements describe how surface area is used to maximize nutrient uptake, not a distinct propulsion pattern.

So, the description that emphasizes pushing contents through the canal and spreading it for enzyme mixing matches propulsion.