TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The ileocecal valve, a sphincter, is usually in a constricted state, but when motility in the ileum increases, this sphincter relaxes, allowing food residue to enter the first portion of large intestine.

SOLUTION: The ileocecal valve, a sphincter, is usually in a constricted state, but when motility in the ileum increases, this sphincter relaxes, allowing food residue to enter the first portion of what?

PROBLEM: Zero is the net force acting on an object when two equal forces are applied from opposite directions.

SOLUTION: What is the net force acting on an object when two equal forces are applied from opposite directions?

PROBLEM: Blood flow decrease when blood vessels constrict.

SOLUTION:
Does blood flow increase or decrease when blood vessels constrict?