Question

question 64
what part of mechanical digestion involves slow segmentation that primarily occurs within the transverse and descending colons?
peristalsis
valsalva maneuver
mass movements
haustral contractions

Explanation:

• Peristalsis: Involves wave - like muscle contractions throughout the digestive tract (not specific to transverse and descending colons for slow segmentation).
• Valsalva maneuver: A non - digestive process related to increasing intra - abdominal pressure (e.g., in forced exhalation against a closed glottis, not mechanical digestion).
• Mass movements: Rapid movements in the large intestine (opposite of slow segmentation).
• Haustral contractions: Slow segmentation movements that occur in the transverse and descending colons as part of mechanical digestion.

Answer:

Haustral contractions