Given the task definition, example input & output, solve the new input case.
Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.
Example: What are arteries, veins, and capillaries examples of?
Output: tissue
Blood vessels include arteries, veins, and capillaries. Tissue is a combination of cells.

New input case for you: When the ventricles begin to contract, pressure within the ventricles rises and blood flows toward the area of lowest pressure, which is initially in the atria. this backflow causes the cusps of the tricuspid and mitral (bicuspid) valves to close. these valves are tied down to the papillary muscles by these?
Output:
chollphyide tendineae