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: What is the hollow and muscular balloon-shaped organ that collects urine? Answer: urinary bladder

SOLUTION: The urinary bladder is the hollow and muscular balloon-shaped organ that collects urine.

PROBLEM: Question: What normal bodily occurrence can cause skeletal muscles to involuntarily contract? Answer: reflexes

SOLUTION: Reflexes normal bodily occurrence can cause skeletal muscles to involuntarily contract.

PROBLEM: Question: Rubbing your hands together warms them by converting work into what energy? Answer: thermal energy

SOLUTION:
Rubbing your hands together warms them by converting work into thermal energy energy.