Final answer:
The Cardiology Department is responsible for processing cholesterol, troponin, and HDL tests.
Step-by-step explanation:
The department responsible for processing cholesterol, troponin, and HDL tests is the Cardiology Department. Cardiology is a branch of medicine that deals with the diagnosis and treatment of heart diseases.
Cholesterol tests measure the levels of various types of cholesterol in the blood, including HDL (high-density lipoprotein), which is often referred to as good cholesterol.
Troponin tests are used to diagnose heart attacks and assess the damage to the heart muscle.