<span>All cardiovascular diseases are caused by poor lifestyle choices is false. While it may be true that causes of cardiovascular diseases are poor lifestyle such as smoking, alcohol and poor diet. Not all can arise from this.
</span>Hormones are <span>chemicals secreted and regulated by the endocrine system is true. Hormones are chemicals which help the body function properly and of course, maintained by our endocrine system.</span>
I'm sure the answer you are looking for is specific to your class, but I would say that the nurse should provide something like, "The tumor is most likely benign, but until we test further, we can't know if it's malignancy."
Living by your personal values sounds easy—at least in theory. Your values, after all, are simply the things that are important to you in life, so it should be natural to live by them.