TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: Does blood flow increase or decrease when blood vessels constrict? Answer: decrease

SOLUTION: Blood flow decrease when blood vessels constrict.

PROBLEM: Question: What type of proteins bind to foreign substances and attempt destruction? Answer: antibodies

SOLUTION: Antibodies bind to foreign substances and attempt destruction.

PROBLEM: Question: When we move down a group of elements on the periodic table, what happens to their electronegativity? Answer: it decreases

SOLUTION:
When we move down a group of elements on the periodic table, their electronegativity it decreases.