Final answer:
Option D (Five-day a week swimming routine) is not a known cause of high blood pressure, whereas the other options are recognized medical causes. Regular exercise like swimming can help manage high blood pressure.
Step-by-step explanation:
The question asks which of the following is not a known cause of high blood pressure: A) Tumors of the adrenal gland, B) Tumor of the anterior pituitary, C) Chronic kidney disease, D) Five-day a week swimming routine, or E) Hormone abnormalities. High blood pressure is often categorized as either primary, with no identifiable cause, or secondary, which is attributable to an underlying condition. Known medical causes of secondary hypertension include tumors of the adrenal gland such as pheochromocytomas causing excessive production of catecholamines, chronic kidney disease, hormonal abnormalities like hyperthyroidism or the use of birth control pills, and tumors of the anterior pituitary that may affect hormonal balance. Conversely, lifestyle factors like a regular swimming routine can potentially help manage or lower blood pressure, making option D (Five-day a week swimming routine) the correct answer as it is not a cause but rather a potential beneficial activity to control high blood pressure.